{"product_id":"factory-4-1-sl-exhaust-silencer-06-13-yamaha-250-450-wr-yz-f-fmf-044235","title":"Factory 4.1 SL Exhaust Silencer 06-13 Yamaha 250 450 WR YZ F - FMF 044235","description":"\u003cp\u003eFMF Racing's Factory4.1 SL Slip-On delivers elite race-proven performance for off-road and motocross riders seeking maximum power gains. Drawing on three decades of championship-winning engineering, this exhaust is constructed from premium titanium and finished in striking blue anodised plating. The slip-on design features a high-strength stainless steel midpipe and endcap, optimising performance across the RPM range while remaining lightweight. Designed for closed-course use, it includes a 94dB insert for sound regulation and comes equipped with a spark arrestor, offering both compliance and versatility.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRace-developed performance with proven horsepower increases\u003c\/li\u003e\n\u003cli\u003eLightweight titanium construction and blue anodised finish\u003c\/li\u003e\n\u003cli\u003eStainless steel midpipe and endcap for enhanced strength\u003c\/li\u003e\n\u003cli\u003eIncludes 94dB quiet insert and spark arrestor screen insert\u003c\/li\u003e\n\u003cli\u003eSlip-on configuration enables quick installation\u003c\/li\u003e\n\u003cli\u003eClosed course use only\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eItem ID: 044235\u003c\/li\u003e\n\u003cli\u003eType: Slip-On\u003c\/li\u003e\n\u003cli\u003eConfiguration: Single\u003c\/li\u003e\n\u003cli\u003eConstruction: Titanium\u003c\/li\u003e\n\u003cli\u003eFinish: Blue Anodised\u003c\/li\u003e\n\u003cli\u003eMidpipe: Stainless Steel\u003c\/li\u003e\n\u003cli\u003eEndcap: Stainless Steel\u003c\/li\u003e\n\u003cli\u003eSpark Arrestor: Screen Insert (included)\u003c\/li\u003e\n\u003cli\u003eQuiet Insert: 94dB Insert (included)\u003c\/li\u003e\n\u003cli\u003eWeight: 5.2 lbs (2.36 kg)\u003c\/li\u003e\n\u003cli\u003eCarb Warning: No\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eVehicle Fitment\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYamaha\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWR250F (2007–2013)\u003c\/li\u003e\n\u003cli\u003eWR450F (2007–2011)\u003c\/li\u003e\n\u003cli\u003eYZ250F (2006–2009)\u003c\/li\u003e\n\u003cli\u003eYZ450F (2006–2009)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"FMF Exhausts","offers":[{"title":"Default Title","offer_id":62854047826250,"sku":"209073","price":472.71,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0897\/1249\/2874\/files\/06-1669-fmf-fsa-1.jpg?v=1785674614","url":"https:\/\/aceraceshop.co.uk\/products\/factory-4-1-sl-exhaust-silencer-06-13-yamaha-250-450-wr-yz-f-fmf-044235","provider":"ACE Race Shop","version":"1.0","type":"link"}