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Whether it’s their handcrafted quality, premium materials, or unprecedented modularity, there’s something that sets FMF apart from the competition. Founded by a California rider and racer, FMF has always been motivated to produce exhaust products and accessories that make bikes faster, lighter, and more reliable.
That’s why we proudly stock FMF 4-stroke exhausts on our website. Whether you need headers like the FMF Power Bomb Header Pipe, the FMF Stainless Steel Megabomb Header Pipe, or the FMF Power Bomb Header Moto Pipe, silencers like the FMF Power Core IV S/A Silencer or the FMF Factory 4.1 RCT Anodized Titanium Silencer, or even full systems like the FMF Mini Power Core IV System or the FMF Factory 4.1 RCT Dual Stainless Steel/Titanium System, we’ve got the selection you need to start ripping it. And, with FMF’s signature modularity, you have more options than ever to truly customize the look, sound, and power of your bike.
High quality and high performance that doesn’t break the bank – you don’t have to make any compromises with an FMF 4-stroke exhaust.

Ty in UT
Lost the old Springs for my FMF fatty these work just fine. Couldnt ask for more.
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Travis in CO
The header is great however it's frustrating that I can not get the end.
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GEORGE in CA
Been using the FMF turbine core II silencer for years on many bikes I like the size of this silencer. Not too big and bulky just right. We need to install this kind of silencer here in CA to ride state riding parks.
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Artem in DE
A good plug for washing your motorcycle; in theory, it should extend the life of the packing by preventing water from getting in during washing
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Jerry in NC
It fits tight and there was no slop. Remove the tail pipe first before installing.
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Travis in WY
Packed a blown out silencer core with this material to bring the exhaust noise back down. The fiberglass density is solid so it wraps tight around the perforated core without tearing apart in your hands. It absorbs sound effectively, tones down that harsh metallic snap, and helps restore crisp throttle response. As long as you pack it evenly without stuffing it too tight, it holds up to oil saturation and high heat for plenty of engine hours. Simple maintenance item that makes a huge difference in exhaust volume.
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