{"product_id":"fmf-044300-powercore-4-slip-on-muffler-yamaha-yfz450r-yfz450x-2009-2022-performance-exhaust","title":"FMF 044300 Powercore 4 Slip-On Muffler — Yamaha YFZ450R \/ YFZ450X (2009-2022) Performance Exhaust","description":"\u003cp\u003e\u003cb\u003eFMF 044300 — Powercore 4 Slip-On Performance Muffler for Yamaha YFZ450R \u0026amp; YFZ450X — Optimized Power, Lightweight Durability, and Track-Proven Versatility\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eUnlock the true potential of your Yamaha YFZ450R or YFZ450X with the FMF 044300 Powercore 4 Slip-On Muffler. Designed by industry-leading exhaust engineers, the Powercore 4 is built to significantly increase horsepower and torque across the entire power curve. Whether you are attacking technical trail sections, ripping through open dunes, or competing on a closed-course motocross track, this muffler delivers a noticeable power boost that is both manageable and highly effective for every style of riding.\u003c\/p\u003e\n\u003cp\u003eThe Powercore 4 is engineered for the perfect balance of weight reduction and structural longevity. It features a high-grade aluminum canister paired with a durable stainless steel Hi-Flo endcap, ensuring the system can handle the intense heat and vibrations of high-performance ATV riding. For riders who enjoy diverse terrain, the included removable spark arrestor ensures that you remain compliant with public land regulations while maintaining the signature, aggressive FMF exhaust note. With its anodized champagne finish, this slip-on is as visually striking as it is mechanically superior.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003ePower-Curve Optimization:\u003c\/b\u003e Developed to provide a smooth, broad increase in both horsepower and torque for improved throttle response and acceleration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eHigh-Strength Construction:\u003c\/b\u003e Lightweight aluminum canister paired with a rugged stainless steel Hi-Flo endcap for long-lasting durability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTrail-Ready Versatility:\u003c\/b\u003e Includes a removable spark arrestor, allowing you to quickly switch between closed-course racing and legal trail riding.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSignature Aesthetics:\u003c\/b\u003e Features a sleek anodized champagne finish that complements the aggressive styling of your Yamaha YFZ450.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePrecision Engineering:\u003c\/b\u003e Designed specifically as a direct slip-on upgrade for easy installation on 2009-2022 Yamaha YFZ450R and 2010-2011 YFZ450X models.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eProven FMF Quality:\u003c\/b\u003e Built with decades of racing heritage to ensure performance consistency and reliability under the most demanding conditions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eMoto-House MX Pro Tip:\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eUpgrading to a slip-on is the quickest way to shed weight and improve your engine's breathing. \u003cb\u003eInstallation Tip:\u003c\/b\u003e Always clean the slip-joint connection thoroughly and use a high-temp exhaust gasket or sealant to ensure a tight, leak-free seal that maximizes performance. \u003cb\u003eTuning Advice:\u003c\/b\u003e While a slip-on often works with factory mapping, pairing this with a performance air filter and a simple fuel tuner will help you extract the maximum gains from this system, especially in higher RPM ranges.\u003c\/p\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #f2f2f2;\"\u003e\n\u003cth style=\"border: 1px solid #dddddd; padding: 8px;\"\u003eTechnical Specs\u003c\/th\u003e\n\u003cth style=\"border: 1px solid #dddddd; padding: 8px;\"\u003eConstruction\u003c\/th\u003e\n\u003cth style=\"border: 1px solid #dddddd; padding: 8px;\"\u003eCompatibility\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #dddddd; padding: 8px; text-align: center;\"\u003eSlip-On Design\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #dddddd; padding: 8px; text-align: center;\"\u003eAluminum\/Stainless Steel\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #dddddd; padding: 8px; text-align: center;\"\u003eYamaha YFZ450R\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #dddddd; padding: 8px; text-align: center;\"\u003eOval Style\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #dddddd; padding: 8px; text-align: center;\"\u003eAnodized Champagne\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #dddddd; padding: 8px; text-align: center;\"\u003eYamaha YFZ450X\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #dddddd; padding: 8px; text-align: center;\"\u003eWeight: 7.15 lbs\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #dddddd; padding: 8px; text-align: center;\"\u003eRemovable Spark Arrestor\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #dddddd; padding: 8px; text-align: center;\"\u003e2009-2022 Models\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eFAQ Questions\u003c\/h3\u003e\n\u003cp\u003eQ) \u003cb\u003eIs this muffler street legal?\u003c\/b\u003e\u003cbr\u003eA) This Powercore 4 slip-on is designed as an off-road performance part. Please check local regulations regarding sound and emissions for your specific riding area.\u003c\/p\u003e\n\u003cp\u003eQ) \u003cb\u003eDo I need to jet or tune my carb\/EFI for this slip-on?\u003c\/b\u003e\u003cbr\u003eA) While not always mandatory for slip-ons, we highly recommend checking your fuel settings. A fuel controller on EFI models like the YFZ450R will ensure optimal performance and engine longevity.\u003c\/p\u003e\n\u003cdiv class=\"silo-links\"\u003e\n\u003ca href=\"\/search?q=Yamaha+YFZ450R+Performance+Exhaust\"\u003eYFZ450R Exhaust\u003c\/a\u003e | \u003ca href=\"\/search?q=FMF+Racing+ATV+Mufflers\"\u003eShop All FMF Racing\u003c\/a\u003e | \u003ca href=\"\/search?q=Yamaha+YFZ450+Performance+Parts\"\u003eYFZ450 Performance\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cb\u003eMoto-House MX – Choice of Champions\u003c\/b\u003e – is located in Clermont\/Montverde, FL. We are the best shop in Central Florida with lightning-fast shipping.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"FMF","offers":[{"title":"Default Title","offer_id":44636781183059,"sku":"044300","price":359.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1754\/5421\/files\/234493.png?v=1779147827","url":"https:\/\/motohousemx.com\/products\/fmf-044300-powercore-4-slip-on-muffler-yamaha-yfz450r-yfz450x-2009-2022-performance-exhaust","provider":"Moto-House MX","version":"1.0","type":"link"}