Products

Fitment: Select your Year/Model and Finish in the Menu Above * NEW - Now available in BLACKOUT Finish! EVO M series has been a Big Gun staple for o...

Specs: Premium aluminum alloy canister body Genuine carbon fiber composite end cap Rapid Tuning System (RTS) allows for swapable end cap inserts (...

Fitment: 2005-2009; 2012-2017 CRF 450X   The Factory 4.1 RCT incorporates FMF's Resonance Chamber Technology™ both internally and externally, In ad...

Details Aluminum Muffler with Carbon Fiber end cap and Stainless Steel Megabomb Header. The FMF Factory 4.1RCT (Resonance Chamber Technology) Alumi...

Details * Blue Anodized Titanium Muffler with Carbon End Cap and Titanium Megabomb Header. FMF is one of the top players in the game when it comes...

Fitment: 2021-2025 CRF 450R/RX The Factory 4.1 RCT incorporates the latest in FMF Resonance Chamber Technology™ both internally and externally. In ...

Blue Anodized Titanium Muffler with Carbon End Cap and Titanium Megabomb Header. Fitment: 2024-2026 WR 450F 2023-2025 YZ 450F 2024-2026 YZ 450FX FM...

Fitment: 2009-2025 YFZ 450R 2010-2011 YFZ 450X Specs: Blue Anodized titanium muffler with stainless powerbomb header Titanium canister body for th...

Fitment: Select your make/model in the menu above Specs: Anodized Blue Titanium canister body for the lightest weight possible Anodized finish giv...

Fitment: 2024-2025 KX 450 2024-2025 KX 450X Specs: Anodized Gray aluminum canister body for the lightest weight possible Genuine carbon fiber com...

Fitment:2001-2007 RM 125 The Factory Fatty is reminiscent of the “works” or cone pipe once used by Factory Teams. It shares many of the same charac...

Fitment:2002-2018 YZ 85/LW The Factory Fatty is reminiscent of the “works” or cone pipe once used by Factory Teams. It shares many of the same char...

Fitment:2002-2025 RM 85 The Factory Fatty is reminiscent of the “works” or cone pipe once used by Factory Teams. It shares many of the same charact...

Fitment:2003-2004 CR 250R The Factory Fatty is reminiscent of the “works” or cone pipe once used by Factory Teams. It shares many of the same chara...

Fitment:2005-2007 CR 250R The Factory Fatty is reminiscent of the “works” or cone pipe once used by Factory Teams. It shares many of the same chara...

Fitment:2005-2021 YZ 125 2020-2022 YZ 125X The Factory Fatty is reminiscent of the “works” or cone pipe once used by Factory Teams. It shares many ...

Fitment:2018-2025 YZ 65 The Factory Fatty is reminiscent of the “works” or cone pipe once used by Factory Teams. It shares many of the same charact...

Fitment:2019-2025 YZ 85/LW The Factory Fatty is reminiscent of the “works” or cone pipe once used by Factory Teams. It shares many of the same char...

Fitment:2022-2025 YZ 125 2023-2025 YZ 125X The Factory Fatty is reminiscent of the “works” or cone pipe once used by Factory Teams. It shares many...

Fitment:1999-2026 YZ 250 The Factory Fatty is reminiscent of the “works” or cone pipe once used by Factory Teams. It shares many of the same charac...

Fitment:2014-2025 KX 85  2014-2021 KX 100 2022-2025 KX 112 The Factory Fatty is reminiscent of the “works” or cone pipe once used by Factory Teams....

Fitment: 1997-1999 CR 250R 2000-2001 CR 250R 2002 CR 250R 2003-2004 CR 250R 2005-2007 CR 250R *Select your year/model in the menu above. This is ...

Fitment: 2002-2025 KLX110 All ModelsWe take fun seriously so we built the Mini Factory 4.1. This is an all out performance exhaust for play bikes. ...

Fitment: 2002-2025 KLX 110 all models We take fun seriously so we built the Mini Factory 4.1. This is an all out performance exhaust for play bikes...

Fitment: 2008-2022 KLX140 all models Blue Anodized muffler with stainless steel end cap Factory 4.1 muffler available in natural titanium or blue...