{"title":"MY21+ Honda CRF 300L Products","description":"","products":[{"product_id":"my21-ecu-tuning-honda-crf-300-l","title":"MY21+ | ECU Tuning | Honda CRF 300 L and Rally","description":"\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eProduct Overview:\u003c\/b\u003e\u003cbr\u003e550Performance offers a range of ECU tunes designed to enhance the performance of the 2021+ Honda CRF300L. Each tune is optimized for specific fuel grades and modifications, delivering increased power, improved throttle response, and enhanced drivability. Updates include revised fuel and ignition timing tables, adjustments to cold start and idle strategies, and refinements to alleviate the common 5000 RPM engine rattle. Whether you're a casual rider or a performance-focused enthusiast, 550Performance tunes unlock the bike’s true potential.\u003cbr\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eKey Features:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul style=\"margin-top: 0in;\" type=\"disc\"\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l2 level1 lfo2; tab-stops: list .5in;\"\u003eIncreased power and torque across all tunes\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l2 level1 lfo2; tab-stops: list .5in;\"\u003eEngine speed limiter raised to 11,000 RPM\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l2 level1 lfo2; tab-stops: list .5in;\"\u003eAdjusted warm idle speed to 1,500 RPM\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l2 level1 lfo2; tab-stops: list .5in;\"\u003eRevised fuel and ignition timing tables for optimal performance\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l2 level1 lfo2; tab-stops: list .5in;\"\u003eEnhanced throttle response and drivability\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l2 level1 lfo2; tab-stops: list .5in;\"\u003eMinimized or eliminated 5000 RPM engine rattle\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l2 level1 lfo2; tab-stops: list .5in;\"\u003eRemoval of check engine lights for EVAP and PAIR systems\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l2 level1 lfo2; tab-stops: list .5in;\"\u003eSmoother deceleration with adjusted fuel cut-off strategy\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eHardware Requirements:\u003c\/b\u003e\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 0in;\" class=\"MsoNormal\"\u003e\u003cb\u003eHow to Use the Tune Matrix\u003c\/b\u003e\u003c\/p\u003e\n\u003col type=\"1\" start=\"1\" style=\"margin-top: 0in;\"\u003e\n\u003cli style=\"margin-bottom: 0in; mso-list: l0 level1 lfo1; tab-stops: list .5in;\" class=\"MsoNormal\"\u003e\u003cb\u003eSelect Your Tune\u003c\/b\u003e\u003c\/li\u003e\n\u003cul type=\"circle\" style=\"margin-top: 0in;\"\u003e\n\u003cli style=\"margin-bottom: 0in; mso-list: l0 level2 lfo1; tab-stops: list 1.0in;\" class=\"MsoNormal\"\u003ePick the stage that matches your goals (Stock Improved → Stage 4.5).\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 0in; mso-list: l0 level2 lfo1; tab-stops: list 1.0in;\" class=\"MsoNormal\"\u003eEach stage has unique hardware requirements for best performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli style=\"margin-bottom: 0in; mso-list: l0 level1 lfo1; tab-stops: list .5in;\" class=\"MsoNormal\"\u003e\n\u003cb\u003eMatch the Hardware\u003c\/b\u003e\n\u003cul type=\"square\" style=\"margin-top: 0in;\"\u003e\n\u003cli style=\"margin-bottom: 0in; mso-list: l0 level3 lfo1; tab-stops: list 1.5in;\" class=\"MsoNormal\"\u003e[0] = Required baseline hardware\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 0in; mso-list: l0 level3 lfo1; tab-stops: list 1.5in;\" class=\"MsoNormal\"\u003e[+] = Recommended upgrade for added performance\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 0in; mso-list: l0 level3 lfo1; tab-stops: list 1.5in;\" class=\"MsoNormal\"\u003e[-] = Acceptable but reduces performance (not ideal)\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 0in; mso-list: l0 level3 lfo1; tab-stops: list 1.5in;\" class=\"MsoNormal\"\u003e[X] = Incompatible – do not use\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cul type=\"circle\" style=\"margin-top: 0in;\"\u003e\n\u003cli style=\"margin-bottom: 0in; mso-list: l0 level2 lfo1; tab-stops: list 1.0in;\" class=\"MsoNormal\"\u003e\n\u003cu\u003eUse only the components listed in the same row as your chosen tune\u003c\/u\u003e:\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli style=\"margin-bottom: 0in; mso-list: l0 level1 lfo1; tab-stops: list .5in;\" class=\"MsoNormal\"\u003e\u003cb\u003eHardware Guidelines by Stage\u003c\/b\u003e\u003c\/li\u003e\n\u003cul type=\"circle\" style=\"margin-top: 0in;\"\u003e\n\u003cli style=\"margin-bottom: 0in; mso-list: l0 level2 lfo1; tab-stops: list 1.0in;\" class=\"MsoNormal\"\u003e\n\u003cb\u003eStock Improved\u003c\/b\u003e → For stock exhaust and simple intake bolt-ons.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 0in; mso-list: l0 level2 lfo1; tab-stops: list 1.0in;\" class=\"MsoNormal\"\u003e\n\u003cb\u003eStage 1.0\u003c\/b\u003e → Optimized for intake and exhaust upgrades.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 0in; mso-list: l0 level2 lfo1; tab-stops: list 1.0in;\" class=\"MsoNormal\"\u003e\n\u003cb\u003eStage 1.5\u003c\/b\u003e → Builds on Stage 1.0 with \u003cb\u003eCB300R camshafts\u003c\/b\u003e.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 0in; mso-list: l0 level2 lfo1; tab-stops: list 1.0in;\" class=\"MsoNormal\"\u003e\n\u003cb\u003eStage 2.0\u003c\/b\u003e → Builds on Stage 1.0 with \u003cb\u003eSport camshafts\u003c\/b\u003e.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 0in; mso-list: l0 level2 lfo1; tab-stops: list 1.0in;\" class=\"MsoNormal\"\u003e\n\u003cb\u003eStage 3.0 \u0026amp; 4.0\u003c\/b\u003e → Designed for \u003cb\u003ebig-bore kits and\u003c\/b\u003e \u003cb\u003ecamshaft upgrades\u003c\/b\u003e.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 0in; mso-list: l0 level2 lfo1; tab-stops: list 1.0in;\" class=\"MsoNormal\"\u003e\n\u003cb\u003eStage 3.5 \u0026amp; 4.5\u003c\/b\u003e → Maximum performance setup with \u003cb\u003ebig-bore, camshafts, and cylinder head work\u003c\/b\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ol\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0602\/0153\/3687\/files\/TuneMatrix_R251214.png?v=1765738645\" alt=\"\" style=\"float: none;\"\u003e\u003c\/div\u003e\n\u003cp data-start=\"2630\" data-end=\"2668\" class=\"\"\u003e\u003cstrong data-start=\"2630\" data-end=\"2668\"\u003eTune Variants \u0026amp; Performance Gains:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"2669\" data-end=\"3119\"\u003e\n\u003cli data-start=\"2669\" data-end=\"2728\" class=\"\"\u003e\n\u003cstrong data-start=\"2671\" data-end=\"2700\"\u003e87\/91 Stock Improved Tune\u003c\/strong\u003e | +11% power \/ +5% torque\u003c\/li\u003e\n\u003cli data-start=\"2729\" data-end=\"2786\" class=\"\"\u003e\n\u003cstrong data-start=\"2731\" data-end=\"2757\"\u003e87\/91 Octane Stage 1.0\u003c\/strong\u003e | +18% power \/ +12% torque\u003c\/li\u003e\n\u003cli data-start=\"2787\" data-end=\"2844\" class=\"\"\u003e\n\u003cstrong data-start=\"2789\" data-end=\"2815\"\u003e87\/91 Octane Stage 1.5\u003c\/strong\u003e | +23% power \/ +12% torque\u003c\/li\u003e\n\u003cli data-start=\"2845\" data-end=\"2899\" class=\"\"\u003e\n\u003cstrong data-start=\"2847\" data-end=\"2870\"\u003e91 Octane Stage 2.0\u003c\/strong\u003e | +30% power \/ +14% torque\u003c\/li\u003e\n\u003cli data-start=\"2900\" data-end=\"2954\" class=\"\"\u003e\n\u003cstrong data-start=\"2902\" data-end=\"2925\"\u003e91 Octane Stage 3.0\u003c\/strong\u003e | +34% power \/ +25% torque\u003c\/li\u003e\n\u003cli data-start=\"2955\" data-end=\"3009\" class=\"\"\u003e\n\u003cstrong data-start=\"2957\" data-end=\"2980\"\u003e91 Octane Stage 3.5\u003c\/strong\u003e | +39% power \/ +31% torque\u003c\/li\u003e\n\u003cli data-start=\"3010\" data-end=\"3064\" class=\"\"\u003e\n\u003cstrong data-start=\"3012\" data-end=\"3035\"\u003e91 Octane Stage 4.0\u003c\/strong\u003e | +45% power \/ +25% torque\u003c\/li\u003e\n\u003cli data-start=\"3065\" data-end=\"3119\" class=\"\"\u003e\n\u003cstrong data-start=\"3067\" data-end=\"3090\"\u003e91 Octane Stage 4.5\u003c\/strong\u003e | +52% power \/ +33% torque\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eImportant Notes:\u003c\/b\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"\" data-end=\"3233\" data-start=\"3147\"\u003eECU reflashes are not compatible with EU-specific ECMs: 38770-K1T-E11, EB1, or EM2\u003c\/li\u003e\n\u003cli class=\"\" data-end=\"3329\" data-start=\"3234\"\u003eInternational customers are responsible for any duties, VAT, or additional shipping charges\u003c\/li\u003e\n\u003cli class=\"\" data-end=\"3442\" data-start=\"3330\"\u003eCore ECU deposit program available for $129.99 USD – contact \u003ca href=\"mailto:support@550Performance.com\"\u003e\u003cstrong data-end=\"3423\" data-start=\"3393\"\u003esupport@550Performance.com\u003c\/strong\u003e\u003c\/a\u003e for availability\u003cb\u003e\u003cbr\u003e\u003c\/b\u003e\n\u003c\/li\u003e\n\u003cli class=\"\" data-end=\"3442\" data-start=\"3330\"\u003eAll fuel octanes listed in AKI (R+M)\/2 (PON)\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"font-weight: bold;\"\u003e\u003cstrong\u003eFOR CLOSED COURSE COMPETITION USE ONLY. NOT INTENDED FOR STREET USE.\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"font-weight: bold;\"\u003e\u003cstrong\u003eNOT LEGAL FOR SALE OR USE ON ANY POLLUTION-CONTROLLED MOTOR VEHICLES.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eMailing Instructions for Mail In Tunes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e550Performance LLC\u003cbr\u003eATTN: ECU Reflash + Order Number\u003cbr\u003e\u003cspan\u003eW3183 Willow Lane\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eHilbert, Wisconsin 54129\u003c\/span\u003e\u003cbr\u003eUSA\u003c\/p\u003e\n\u003cp\u003eUpon receipt, we will flash the ECU and send it back to you. Typical turnaround is 1 - 3 business days. In some rare cases this could be as long as 5 business days.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003eUnleash your CRF300L’s full performance with 550Performance ECU tuning – built for riders who demand more.\u003c\/p\u003e","brand":"550Performance","offers":[{"title":"Please send me a preflashed ECU","offer_id":42698201432311,"sku":"F0101","price":299.98,"currency_code":"USD","in_stock":true},{"title":"I will send in my own ECU for flashing","offer_id":42698201465079,"sku":"F0103","price":149.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0602\/0153\/3687\/files\/TuneMatrix_R251214.png?v=1765738829"},{"product_id":"modified-high-flow-airbox-door","title":"High Flow Airbox Lid","description":"\u003cp\u003eThe high flow airbox lid opens up your airbox for increased airflow allowing the engine to produce more power. It features Frogzskin which is a waterproof mesh membrane vent that can be submerged without allowing water to pass through. One will not sacrifice water fording height with the addition of this product. The Revision 2 design increases the air inlet by nearly 4x. Best of all, this product comes ready to bolt on. No need to drill holes or modify existing parts. \u003c\/p\u003e\n\u003cp\u003eThis part pairs nicely with any of our CRF 300L tunes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWe recommend cleaning with soapy water and a gentle water stream as necessary. Direct pressure washing is not recommended as it can damage the mesh membrane. \u003c\/p\u003e","brand":"550Performance LLC","offers":[{"title":"Default Title","offer_id":42679396827383,"sku":"17260-K1T-550","price":59.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0602\/0153\/3687\/files\/7AD583C8-2A05-4BE5-B4BB-EF5C0648A9FB.jpg?v=1719104921"},{"product_id":"stage-1-5-camshaft","title":"Honda CB300R OEM Camshafts","description":"\u003ch2\u003eOverview:\u003c\/h2\u003e\n\u003cp\u003eOEM CB300R camshafts for the CRF 300L that pair with our Stage 1.5 \/ 3.0 \/ 3.5 tunes. These camshafts have more lift and duration than the OEM CRF300L camshafts and a wider LSA than the CBR300R camshafts. Power band is raised slightly allowing the bike to make more power. Minimal low end torque sacrifice over stock. This setup works well for technical single track, flowing double track, and wide-open use. These camshafts provide linear power which provides a very predictable riding engine.  Best of all, engine durability is not sacrificed since all OEM internal engine hardware is used.\u003c\/p\u003e\n\u003ch2\u003eFeatures:\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eIncreased top end power\u003c\/li\u003e\n\u003cli\u003eLinear predictable power band\u003c\/li\u003e\n\u003cli\u003eMinimal low end torque loss below 4000RPM\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eRequired Hardware:\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCRF 300L \/ Rally\u003c\/li\u003e\n\u003cli\u003eStage 1.5, 3.0, or 3.5 Tune\u003c\/li\u003e\n\u003cli\u003eFull exhaust system\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eRecommend Hardware:\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eModified airbox\u003c\/li\u003e\n\u003cli\u003eHigh flow airbox lid\u003c\/li\u003e\n\u003cli\u003eHigh flow airbox tube\u003c\/li\u003e\n\u003cli\u003eAftermarket air filter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e","brand":"550Performance LLC","offers":[{"title":"Default Title","offer_id":43410479055095,"sku":"STG1.5Cams","price":99.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0602\/0153\/3687\/products\/IMG_5478.jpg?v=1666831812"},{"product_id":"pair-block-off-plate","title":"PAIR Block-Off Plate","description":"\u003cp\u003eThe PAIR Block-Off Plate is a solution for sealing off the air injection system present in the following bikes: CRF300L\/Rally, CRF250L\/Rally, Rebel\/CMX 300, CBR250R, CBR300R, and CB300R\/F. This system injects fresh air into the exhaust port to burn off residual hydrocarbons in the catalyst. However, when an aftermarket exhaust system is added, the bike can develop deceleration popping due to the PAIR system injecting air into a fuel-rich environment. The PAIR Block-Off Plate can significantly reduce this popping.\u003c\/p\u003e\n\u003cp\u003eRemoving the PAIR system can also help reduce the bike's weight by eliminating actuators and air hoses. Moreover, if you plan to run a wideband oxygen sensor in your exhaust, removing the PAIR system is essential. This is because when the PAIR system is active and closed loop fueling is not active, the air-to-fuel ratio will read lean, causing inaccuracies in the readings. Removing the PAIR system allows for accurate air-to-fuel ratio measurements using a wideband oxygen sensor.\u003c\/p\u003e\n\u003cp\u003eTo install the block-off plate, follow these steps:\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003eRemove the barbed PAIR fitting attached to the top of the valve cover.\u003c\/li\u003e\n\u003cli\u003eTake off the reed valve assembly.\u003c\/li\u003e\n\u003cli\u003eDisassemble the reed valve from the gasket assembly using a Phillips screwdriver.\u003c\/li\u003e\n\u003cli\u003eRemove the backfire screen from the PAIR assembly.\u003c\/li\u003e\n\u003cli\u003eInstall the gasket assembly back in the valve cover.\u003c\/li\u003e\n\u003cli\u003eAttach the block-off plate.\u003c\/li\u003e\n\u003cli\u003ePlace the barb plug on the airbox port.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"550Performance LLC","offers":[{"title":"Default Title","offer_id":43816722039031,"sku":"PD_250_300L","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0602\/0153\/3687\/files\/IMG_17962024-10-2015_00_19.png?v=1729437015"},{"product_id":"crf300l-sport-camshafts","title":"CRF300L Sport Camshafts","description":"\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eSport camshafts for the CRF 300L that pair with our Stage 2.0 tune. These camshafts boast more lift, duration, and overlap resulting in more peak torque and horsepower. These camshafts sacrifice minimal low end torque loss compared to stock and deliver an exhilarating power band. This setup works well for street, flowing double track, as well as single track. A properly equipped bike can expect a +29.9% gain in power and 14.1% gain in peak torque over stock.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eIncreased top end power and torque\u003c\/li\u003e\n\u003cli\u003eDefined exhilarating power band\u003c\/li\u003e\n\u003cli\u003eMinimal low end torque loss below 4500RPM\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eRequired Hardware:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCRF 300L \/ Rally\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.550performance.com\/products\/my21-ecu-tuning-honda-crf-300-l?variant=42698201563383\"\u003eStage 2.0 flashed ECU\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003eFull exhaust system\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eOptional:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eModified airbox\u003c\/li\u003e\n\u003cli\u003eHigh flow airbox lid\u003c\/li\u003e\n\u003cli\u003eHigh flow airbox tube\u003c\/li\u003e\n\u003cli\u003eAftermarket air filter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eValve Clearance:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eIntake: 0.20mm\u003c\/li\u003e\n\u003cli\u003eExhaust: 0.30mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"550Performance LLC","offers":[{"title":"Default Title","offer_id":43853778157815,"sku":"14110-14210-K1T-550","price":299.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0602\/0153\/3687\/files\/IMG_7551.jpg?v=1684851305"},{"product_id":"crf-300l-301cc-big-bore-kit","title":"CRF 300L 301cc Big Bore Kit","description":"\u003cp\u003eThis 78mm (+2mm) forged piston kit boosts the CRF 300L's displacement to 300cc and increases compression from 10.7:1 to 11.5:1 for better throttle response and power. Pairing this kit with our \u003ca href=\"https:\/\/www.550performance.com\/products\/my21-ecu-tuning-honda-crf-300-l?variant=44027457765623\"\u003eStage 3 tune\u003c\/a\u003e can result in an impressive 31+ horsepower and 22+ foot-pounds of torque, a 34% and 25% jump respectively. For the highest performance, opt for the \u003ca href=\"https:\/\/www.550performance.com\/products\/my21-ecu-tuning-honda-crf-300-l?variant=44027457831159\"\u003eStage 4 tune\u003c\/a\u003e and parts package, boosting horsepower by a reliable 46% and torque by 26%, for a total of 34+ horsepower and 22+ foot-pounds of torque - similar to the 350cc European dual sports.\u003cbr\u003e\u003cbr\u003eThis kit includes the piston, tool-steel wrist pin, circlips, Japanese-made ring pack, Cometic head\/base gaskets in custom thicknesses to provide ideal quench clearance, and a new OEM cylinder with black or silver color bored to the piston size. Each piston\/cylinder set is expertly marked with distinct serial numbers. All parts (except for the ring pack) are fabricated in the USA.\u003c\/p\u003e\n\u003cp\u003eThere are other, imported kits on the market that offer more displacement, but that comes at the cost of increased ring drag and piston rock. This kit was developed by CBR300R racer and YouTube host Ari Henning for his own personal race use, and as such it has been highly refined and proven completely reliable. Ari won several championships, \u003ca rel=\"noopener noreferrer\" href=\"https:\/\/www.youtube.com\/watch?v=bfAjy5Dq5TQ\u0026amp;themeRefresh=1\" target=\"_blank\"\u003eset one lap record\u003c\/a\u003e, and won dozens of races with this kit. Customers have even run this piston with turbos and put it in land-speed bikes. This same performance and reliability is available for your CRF300L.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0602\/0153\/3687\/files\/301_BBK_Break-In_Recommendations_V3.pdf?v=1751920501\" target=\"_blank\" title=\"AHR 301cc Big Bore Kit for CRF300L Break In Recommedations\" rel=\"noopener\"\u003eBreak In Recommendations\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThis kit should only be installed by a certified dealer or a person with access to a service manual. ECU tuning and compatible accessories should be used in conjunction with this kit. The rings come pre-gapped and new head stud nuts are included with this kit. \u003c\/strong\u003e\u003c\/p\u003e","brand":"Ari Henning Signature Series","offers":[{"title":"Default Title","offer_id":44023591600375,"sku":"BBK301","price":749.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0602\/0153\/3687\/files\/IMG_9012.png?v=1697031588"},{"product_id":"550performance-silhouette-t-shirt","title":"550Performance Silhouette T-Shirt","description":"\u003cspan data-mce-fragment=\"1\"\u003eIntroducing the 550Performance Dirt Bike Silhouette T-shirt - a perfect blend of style and comfort. Printed in vibrant colors on soft 100% ring-spun cotton. Whether you love off-road adventures or just want a comfy and stylish shirt, this one's for you. Embrace the thrill and comfort with the 550Performance Dirt Bike Silhouette T-shirt — because your style should be as exciting as your adventures.\u003c\/span\u003e","brand":"550Performance","offers":[{"title":"Small","offer_id":44151365107959,"sku":"550PTShirt-1","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Medium","offer_id":44151365239031,"sku":"550PTShirt-2","price":24.99,"currency_code":"USD","in_stock":false},{"title":"Large","offer_id":44151365271799,"sku":"550PTShirt-3","price":24.99,"currency_code":"USD","in_stock":false},{"title":"XL","offer_id":44151365304567,"sku":"550PTShirt-4","price":24.99,"currency_code":"USD","in_stock":false},{"title":"XXL","offer_id":44151365337335,"sku":"550PTShirt-5","price":24.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0602\/0153\/3687\/files\/T-Shirt.png?v=1700532287"},{"product_id":"european-crf-300l-tuning","title":"European CRF 300L Tuning","description":"\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eProduct Overview:\u003c\/b\u003e\u003cbr\u003e550Performance offers a range of ECU tunes designed to enhance the performance of the 2021+ Honda CRF300L, including the latest 2025 Euro5+ model. Each tune is optimized for specific fuel grades and modifications, delivering increased power, improved throttle response, and enhanced drivability. Updates include revised fuel and ignition timing tables, adjustments to cold start and idle strategies, and refinements to alleviate the common 5000 RPM engine rattle. Whether you're a casual rider or a performance-focused enthusiast, 550Performance tunes unlock the bike’s true potential.\u003cbr\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eKey Features:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul style=\"margin-top: 0in;\" type=\"disc\"\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l2 level1 lfo2; tab-stops: list .5in;\"\u003eIncreased power and torque across all tunes\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l2 level1 lfo2; tab-stops: list .5in;\"\u003eEngine speed limiter raised to 11,000 RPM\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l2 level1 lfo2; tab-stops: list .5in;\"\u003eAdjusted warm idle speed to 1,500 RPM\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l2 level1 lfo2; tab-stops: list .5in;\"\u003eRevised fuel and ignition timing tables for optimal performance\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l2 level1 lfo2; tab-stops: list .5in;\"\u003eEnhanced throttle response and drivability\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l2 level1 lfo2; tab-stops: list .5in;\"\u003eMinimized or eliminated 5000 RPM engine rattle\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l2 level1 lfo2; tab-stops: list .5in;\"\u003eRemoval of check engine lights for EVAP, PAIR, and post catalyst oxygen sensor systems (2025+ models only)\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"mso-list: l2 level1 lfo2; tab-stops: list .5in;\"\u003eSmoother deceleration with adjusted fuel cut-off strategy\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eHardware Requirements:\u003c\/b\u003e\u003c\/p\u003e\n\u003cp style=\"margin-bottom: 0in;\" class=\"MsoNormal\"\u003e\u003cb\u003eHow to Use the Tune Matrix\u003c\/b\u003e\u003c\/p\u003e\n\u003col type=\"1\" start=\"1\" style=\"margin-top: 0in;\"\u003e\n\u003cli style=\"margin-bottom: 0in; mso-list: l0 level1 lfo1; tab-stops: list .5in;\" class=\"MsoNormal\"\u003e\u003cb\u003eSelect Your Tune\u003c\/b\u003e\u003c\/li\u003e\n\u003cul type=\"circle\" style=\"margin-top: 0in;\"\u003e\n\u003cli style=\"margin-bottom: 0in; mso-list: l0 level2 lfo1; tab-stops: list 1.0in;\" class=\"MsoNormal\"\u003ePick the stage that matches your goals (Stock Improved → Stage 4.5).\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 0in; mso-list: l0 level2 lfo1; tab-stops: list 1.0in;\" class=\"MsoNormal\"\u003eEach stage has unique hardware requirements for best performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli style=\"margin-bottom: 0in; mso-list: l0 level1 lfo1; tab-stops: list .5in;\" class=\"MsoNormal\"\u003e\n\u003cb\u003eMatch the Hardware\u003c\/b\u003e\n\u003cul type=\"square\" style=\"margin-top: 0in;\"\u003e\n\u003cli style=\"margin-bottom: 0in; mso-list: l0 level3 lfo1; tab-stops: list 1.5in;\" class=\"MsoNormal\"\u003e[0] = Required baseline hardware\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 0in; mso-list: l0 level3 lfo1; tab-stops: list 1.5in;\" class=\"MsoNormal\"\u003e[+] = Recommended upgrade for added performance\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 0in; mso-list: l0 level3 lfo1; tab-stops: list 1.5in;\" class=\"MsoNormal\"\u003e[-] = Acceptable but reduces performance compared to the optimal setup (not ideal)\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 0in; mso-list: l0 level3 lfo1; tab-stops: list 1.5in;\" class=\"MsoNormal\"\u003e[X] = Incompatible – do not use\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cul type=\"circle\" style=\"margin-top: 0in;\"\u003e\n\u003cli style=\"margin-bottom: 0in; mso-list: l0 level2 lfo1; tab-stops: list 1.0in;\" class=\"MsoNormal\"\u003e\n\u003cu\u003eUse only the components listed in the same row as your chosen tune\u003c\/u\u003e:\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cli style=\"margin-bottom: 0in; mso-list: l0 level1 lfo1; tab-stops: list .5in;\" class=\"MsoNormal\"\u003e\u003cb\u003eHardware Guidelines by Stage\u003c\/b\u003e\u003c\/li\u003e\n\u003cul type=\"circle\" style=\"margin-top: 0in;\"\u003e\n\u003cli style=\"margin-bottom: 0in; mso-list: l0 level2 lfo1; tab-stops: list 1.0in;\" class=\"MsoNormal\"\u003e\n\u003cb\u003eStock Improved\u003c\/b\u003e → For stock exhaust and simple intake bolt-ons.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 0in; mso-list: l0 level2 lfo1; tab-stops: list 1.0in;\" class=\"MsoNormal\"\u003e\n\u003cb\u003eStage 1.0\u003c\/b\u003e → Optimized for intake and exhaust upgrades.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 0in; mso-list: l0 level2 lfo1; tab-stops: list 1.0in;\" class=\"MsoNormal\"\u003e\n\u003cb\u003eStage 1.5\u003c\/b\u003e → Builds on Stage 1.0 with \u003cb\u003eCB300R camshafts\u003c\/b\u003e.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 0in; mso-list: l0 level2 lfo1; tab-stops: list 1.0in;\" class=\"MsoNormal\"\u003e\n\u003cb\u003eStage 2.0\u003c\/b\u003e → Builds on Stage 1.0 with \u003cb\u003eSport camshafts\u003c\/b\u003e.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 0in; mso-list: l0 level2 lfo1; tab-stops: list 1.0in;\" class=\"MsoNormal\"\u003e\n\u003cb\u003eStage 3.0 \u0026amp; 4.0\u003c\/b\u003e → Designed for \u003cb\u003ebig-bore kits and\u003c\/b\u003e \u003cb\u003ecamshaft upgrades\u003c\/b\u003e.\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 0in; mso-list: l0 level2 lfo1; tab-stops: list 1.0in;\" class=\"MsoNormal\"\u003e\n\u003cb\u003eStage 3.5 \u0026amp; 4.5\u003c\/b\u003e → Maximum performance setup with \u003cb\u003ebig-bore, camshafts, and cylinder head work\u003c\/b\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ol\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0602\/0153\/3687\/files\/TuneMatrix_R250707.png?v=1751920689\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp data-start=\"2630\" data-end=\"2668\" class=\"\"\u003e\u003cstrong data-start=\"2630\" data-end=\"2668\"\u003eTune Variants \u0026amp; Performance Gains:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"2669\" data-end=\"3119\"\u003e\n\u003cli data-start=\"2669\" data-end=\"2728\" class=\"\"\u003e\n\u003cstrong data-start=\"2671\" data-end=\"2700\"\u003e91\/95 Stock Improved Tune\u003c\/strong\u003e | +11% power \/ +5% torque\u003c\/li\u003e\n\u003cli data-start=\"2729\" data-end=\"2786\" class=\"\"\u003e\n\u003cstrong data-start=\"2731\" data-end=\"2757\"\u003e91\/95 Octane Stage 1.0\u003c\/strong\u003e | +18% power \/ +12% torque\u003c\/li\u003e\n\u003cli data-start=\"2787\" data-end=\"2844\" class=\"\"\u003e\n\u003cstrong data-start=\"2789\" data-end=\"2815\"\u003e91\/95 Octane Stage 1.5\u003c\/strong\u003e | +23% power \/ +12% torque\u003c\/li\u003e\n\u003cli data-start=\"2845\" data-end=\"2899\" class=\"\"\u003e\n\u003cstrong data-start=\"2847\" data-end=\"2870\"\u003e95 Octane Stage 2.0\u003c\/strong\u003e | +30% power \/ +14% torque\u003c\/li\u003e\n\u003cli data-start=\"2900\" data-end=\"2954\" class=\"\"\u003e\n\u003cstrong data-start=\"2902\" data-end=\"2925\"\u003e95 Octane Stage 3.0\u003c\/strong\u003e | +34% power \/ +25% torque\u003c\/li\u003e\n\u003cli data-start=\"2955\" data-end=\"3009\" class=\"\"\u003e\n\u003cstrong data-start=\"2957\" data-end=\"2980\"\u003e95 Octane Stage 3.5\u003c\/strong\u003e | +39% power \/ +31% torque\u003c\/li\u003e\n\u003cli data-start=\"3010\" data-end=\"3064\" class=\"\"\u003e\n\u003cstrong data-start=\"3012\" data-end=\"3035\"\u003e95 Octane Stage 4.0\u003c\/strong\u003e | +45% power \/ +25% torque\u003c\/li\u003e\n\u003cli data-start=\"3065\" data-end=\"3119\" class=\"\"\u003e\n\u003cstrong data-start=\"3067\" data-end=\"3090\"\u003e95 Octane Stage 4.5\u003c\/strong\u003e | +52% power \/ +33% torque\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003eImportant Notes:\u003c\/b\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"\" data-end=\"3233\" data-start=\"3147\"\u003eEU ECU reflashes compatible with EU-specific ECMs: 38770-K1T-E11, EB1, and EM2\u003c\/li\u003e\n\u003cli class=\"\" data-end=\"3329\" data-start=\"3234\"\u003eInternational customers are responsible for any duties, VAT, or additional shipping charges\u003c\/li\u003e\n\u003cli class=\"\" data-end=\"3442\" data-start=\"3330\"\u003eCore ECU deposit program available for $399.99 USD – contact \u003ca href=\"mailto:support@550Performance.com\"\u003e\u003cstrong data-end=\"3423\" data-start=\"3393\"\u003esupport@550Performance.com\u003c\/strong\u003e\u003c\/a\u003e for availability\u003cb\u003e\u003cbr\u003e\u003c\/b\u003e\n\u003c\/li\u003e\n\u003cli class=\"\" data-end=\"3442\" data-start=\"3330\"\u003eAll fuel octanes listed in research octane (RON)\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"font-weight: bold;\"\u003e\u003cstrong\u003eFOR CLOSED COURSE COMPETITION USE ONLY. NOT INTENDED FOR STREET USE.\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"font-weight: bold;\"\u003e\u003cstrong\u003eNOT LEGAL FOR SALE OR USE ON ANY POLLUTION-CONTROLLED MOTOR VEHICLES.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eMailing Instructions for Mail In Tunes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e550Performance LLC\u003cbr\u003eATTN: ECU Reflash + Order Number\u003cbr\u003e\u003cspan\u003eW3183 Willow Lane\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eHilbert, Wisconsin 54129\u003c\/span\u003e\u003cbr\u003eUSA\u003c\/p\u003e\n\u003cp\u003eUpon receipt, we will flash the ECU and send it back to you. Typical turnaround is 1 - 3 business days. In some rare cases this could be as long as 5 business days.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003eUnleash your CRF300L’s full performance with 550Performance ECU tuning – built for riders who demand more.\u003c\/p\u003e","brand":"550Performance","offers":[{"title":"I will Mail in My Stock ECU","offer_id":44476296429815,"sku":"","price":199.99,"currency_code":"USD","in_stock":true},{"title":"Please Send me a Preprogrammed ECU","offer_id":44476296626423,"sku":"","price":799.98,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0602\/0153\/3687\/files\/TuneMatrix_R25102.png?v=1759412621"},{"product_id":"crf300l-twinair-air-filter-with-cage-kit","title":"CRF300L TwinAir Air Filter with Cage Kit","description":"\u003cul class=\"mb-4 mt-2 pl-3\"\u003e\n\u003cli class=\"feature-bullet font-weight-light ng-star-inserted\"\u003eDual-bonded foam design filters out even the smallest dirt particles, while allowing more airflow than two separate layer filters (flow bench proven)\u003c\/li\u003e\n\u003cli class=\"feature-bullet font-weight-light ng-star-inserted\"\u003eTwin Air filters are slightly smaller than stock to make them easier to change and to increase dead air space around the filter for better performance\u003c\/li\u003e\n\u003cli class=\"feature-bullet font-weight-light ng-star-inserted\"\u003eFlat foam sealing ring securely seats against the airbox, even in the worst riding conditions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!----\u003e","brand":"TwinAir","offers":[{"title":"Default Title","offer_id":45134190248183,"sku":"150609P","price":69.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0602\/0153\/3687\/files\/Twin_Air_Filter_Honda_CRF300L_150609P_front.jpg?v=1721754481"},{"product_id":"pre-oiled-flame-retardant-air-filter","title":"CRF300L TwinAir Un-Oiled Flame-Retardant Replacement Air Filter","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eTwin Air filters feature a dual-layer design combining a coarse outer foam with a fine inner foam, bonded into a single durable unit for optimal filtration and airflow. The coarse outer layer captures larger debris like dirt and sand, while the fine inner layer traps smaller particles without restricting air passage. This construction enhances air volume around the filter, boosting intake airflow and engine power. Tested on flow benches, these filters resist clogging and provide reliable engine protection in all riding conditions. Additional benefits include a greaseless sealing ring for a secure fit and a resealable bag for easy storage.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!----\u003e","brand":"TwinAir","offers":[{"title":"Default Title","offer_id":45134204141815,"sku":"150609FR","price":21.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0602\/0153\/3687\/files\/150609FR_front.webp?v=1721755248"},{"product_id":"crf-300l-high-flow-airbox-velocity-stack","title":"High Flow Airbox Velocity Stack","description":"\u003cp\u003eThe 550Performance high flow velocity stack removes unnecessary restriction created by the OEM airbox tube on the CRF 300L. This velocity allows the full utilization of the throttle body bore by port matching the inlet diameter and increases overall airflow to the engine. This all new design allows for a no cut installation. \u003c\/p\u003e\n\u003cp\u003e\u003ca rel=\"noopener\" title=\"Velocity stack installation instructions\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0602\/0153\/3687\/files\/Airbox_HighFlowVelocityTube_Install_v1.4.pdf?v=1727014443\" target=\"_blank\"\u003e\u003cstrong\u003eInstallation instructions.\u003c\/strong\u003e\u003c\/a\u003e\u003ca title=\"Velocity stack installation instructions\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0602\/0153\/3687\/files\/Airbox_HighFlowVelocityTube_Install.pdf\"\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"550Performance LLC","offers":[{"title":"Default Title","offer_id":49091256484087,"sku":"17251-K1T-550","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0602\/0153\/3687\/files\/IMG_11472024-09-2214_08_43.heic?v=1727014191"},{"product_id":"550performance-gift-card","title":"550Performance Gift Card","description":"","brand":"550Performance","offers":[{"title":"$10.00","offer_id":49288116044023,"sku":null,"price":10.0,"currency_code":"USD","in_stock":true},{"title":"$25.00","offer_id":49288116076791,"sku":null,"price":25.0,"currency_code":"USD","in_stock":true},{"title":"$50.00","offer_id":49288116109559,"sku":null,"price":50.0,"currency_code":"USD","in_stock":true},{"title":"$100.00","offer_id":49288116142327,"sku":null,"price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0602\/0153\/3687\/files\/Giftcard.png?v=1733968476"},{"product_id":"high-flow-snorkel","title":"High Flow Snorkel","description":"\u003cp\u003eUpgrade your CRF300L snorkel with our high flow replacement. Experience better air flow distribution and reduced turbulence in your airbox, making it an essential addition to your bike. Pair it with one of our tune offerings for optimal performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInstallation Guide: \u003c\/strong\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0602\/0153\/3687\/files\/Airbox_HighFlowSnorkel_Install.pdf?v=1737137896\" title=\"Instructions\" target=\"_blank\" rel=\"noopener\"\u003eInstructions\u003c\/a\u003e\u003cstrong\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0602\/0153\/3687\/files\/Airbox_HighFlowSnorkel_Install.pdf?v=1737137896\" title=\"Instructions\" target=\"_blank\" rel=\"noopener\"\u003e\u003c\/a\u003e\u003c\/strong\u003e\u003c\/p\u003e","brand":"550Performance LLC","offers":[{"title":"Default Title","offer_id":49355971166455,"sku":"17241-K1T-550","price":34.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0602\/0153\/3687\/files\/IMG_2232.jpg?v=1737137391"},{"product_id":"yoshimura-rs4-quiet-insert","title":"Yoshimura RS4 Quiet Insert","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eEngineered for the CRF 300L Yoshimura RS4 muffler, this quiet insert delivers measurable noise reduction without sacrificing performance. Compatible with or without the Yoshimura spark arrestor, it achieves approximately a 6dB reduction at idle and 5500RPM—translating to roughly 30% perceived sound pressure reduction. Due to the logarithmic nature of the decibel scale, this modest technical decrease produces a substantially quieter riding experience. The insert maintains the system's power delivery while making it significantly more refined and street-friendly.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"550Performance LLC","offers":[{"title":"Default Title","offer_id":50312662679799,"sku":null,"price":59.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0602\/0153\/3687\/files\/IMG_3775.jpg?v=1764290851"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0602\/0153\/3687\/collections\/2021-crf300l-red-650x380.webp?v=1696731391","url":"https:\/\/www.550performance.com\/en-za\/collections\/my21-honda-crf-300l-products\/cmx-300.oembed","provider":"550Performance","version":"1.0","type":"link"}