{"product_id":"fmf-racing-yamaha-yz450f-18-26-wr450f-2019-yz450fx-19-24-hex-q4-s-a-muffler","title":"FMF Racing Yamaha YZ450F 2018-2026\/WR450F (2019)\/ YZ450FX 2019-2024 Hex Q4 S\/A Muffler","description":"\u003cp\u003eFMF Racing Yamaha YZ450F 18-26\/WR450F (2019)\/ YZ450FX 19-24 Hex Q4 S\/A Muffler is a motorcycle exhaust component for Yamaha models listed in the title (2019), built for riders who want a catalog-matched replacement or upgrade.\u003c\/p\u003e\n\u003cp\u003eA 4-Stroke header system that incorporates FMF's patented Power Bomb module at a precise location in the initial stage of the header system; by positioning the \"Bomb\" at this key point, the expansion and contraction of exhaust sonics through the system resulting in a flow increase of nearly 10%. The surface of the perforated core lets the sound exit into the absorbing material (steel wool packing) and then allows the air to expand, cool and ramp back up at higher air pressures (RPMs). The Power Bomb is a \"pre-muffler\" of sorts, which helps to lower the bike's sound output because it provides more sound-absorbing surface area to allow the exhaust gases to become absorbed. Fitment: Yamaha WR450F Base 2019 Yamaha YZ450F Base 2018 Yamaha YZ450F Base 2019 Yamaha YZ450F Base 2020 Yamaha YZ450F Base 2021 Yamaha YZ450FX Base 2019 Yamaha YZ450FX Base 2020\u003c\/p\u003e\n\u003ch3\u003eProduct details\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBrand: FMF\u003c\/li\u003e\n\u003cli\u003eProduct number: 044442, fmf044442, 18211837\u003c\/li\u003e\n\u003cli\u003eCategory: motorcycle exhaust component\u003c\/li\u003e\n\u003cli\u003eManufacturer part number: 044442\u003c\/li\u003e\n\u003cli\u003eUnit: 1\u003c\/li\u003e\n\u003cli\u003eEPA: Compliant\u003c\/li\u003e\n\u003cli\u003eCategory: Exhaust, Mufflers \u0026amp; Tips\u003c\/li\u003e\n\u003cli\u003eSubcategory: Muffler\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eConfirm the SKU, selected variant, and vehicle fitment before ordering.\u003c\/p\u003e","brand":"FMF Racing","offers":[{"title":"Default Title","offer_id":42738277154903,"sku":"044442","price":449.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0644\/4928\/2135\/files\/178c55cabfd458bde7afdb6f89cebd0c_1f8150f5-cf21-4d09-a171-f433b4499fec.jpg?v=1777569775","url":"https:\/\/parts4motorcycles.com\/products\/fmf-racing-yamaha-yz450f-18-26-wr450f-2019-yz450fx-19-24-hex-q4-s-a-muffler","provider":"Parts4Motorcycles","version":"1.0","type":"link"}