{"product_id":"fmf-factory-4-1-megabomb-exhaust-system-yamaha-yfz450r","title":"FMF Factory 4.1 Exhaust System with MegaBomb Header - Yamaha YFZ450R","description":"\u003ch3\u003e✓ Fits\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eYamaha YFZ450R (2009-2026) and YFZ450X (2010-2011).\u003c\/strong\u003e Complete Factory 4.1 exhaust system with MegaBomb header.\u003c\/p\u003e\n\u003ch3\u003e✓ About the Factory 4.1 System\u003c\/h3\u003e\n\u003cp\u003eThis is FMF's flagship full exhaust system for the YFZ450R. The Factory 4.1 pairs a titanium muffler with a carbon fiber end cap and FMF's MegaBomb header for superior power and performance, with horsepower improved throughout the rpm range. FMF's factory forward engineering centralizes mass to improve handling, so you get more power and a better-balanced quad in one complete system.\u003c\/p\u003e\n\u003ch3\u003e✓ Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eComplete 1-into-1 full exhaust system with FMF MegaBomb header\u003c\/li\u003e\n\u003cli\u003eSuperior power and performance, horsepower improved throughout the rpm range\u003c\/li\u003e\n\u003cli\u003eFactory forward engineering centralizes mass for improved handling\u003c\/li\u003e\n\u003cli\u003eTitanium muffler with anodized blue finish and carbon fiber end cap\u003c\/li\u003e\n\u003cli\u003eStainless steel header pipe with the MegaBomb module\u003c\/li\u003e\n\u003cli\u003eLightweight construction, muffler weighs about 5 lb\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e✓ What's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOne FMF Factory 4.1 titanium muffler with carbon fiber end cap\u003c\/li\u003e\n\u003cli\u003eOne FMF MegaBomb stainless steel header\u003c\/li\u003e\n\u003cli\u003eMounting hardware\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"background-color:#fff3cd; border:1px solid #d4892a; color:#0E0D0B; padding:10px;\"\u003e\u003cstrong\u003eWARNING:\u003c\/strong\u003e This product can expose you to chemicals known to the State of California to cause cancer and reproductive harm. For more information visit www.P65Warnings.ca.gov.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eShips fast from DuneGoonShop!\u003c\/strong\u003e\u003c\/p\u003e","brand":"Parts Unlimited","offers":[{"title":"Default Title","offer_id":49091354525921,"sku":"1830-0410","price":1478.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1219\/2993\/files\/Screenshot2026-09-11075014.png?v=1789138282","url":"https:\/\/dunegoonshop.com\/en-ca\/products\/fmf-factory-4-1-megabomb-exhaust-system-yamaha-yfz450r","provider":"Dune Goons","version":"1.0","type":"link"}