FMF Racing Factory 4.1SL Slip-On Mufflers - Stainless

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Starting at: $374.95 $337.46
Save: 10% off

Factory 4.1 SL Stainless Steel (S/S) Midpipe Titanium slip-on muffler with stainless steel midpipe. Available in natural titanium or blue anodized finish. Fits stock or FMF header. Boosts low-mid torque, broader powerband, more over-rev.

Features exclusive proprietary Chamber Core technology.

Factory Forward Engineering centralizes mass, improves handling.

All titanium construction canister and endcaps.

Made from premium quality American materials.

Customize with performance tuning inserts and spark arrestor module.

Meets AMA sound requirements on most models; inserts available for others.

FMF pioneered Factory Forward engineering; moving the muffler further forward in the frame, shortening the midpipe and muffler length to centralize mass and lower the center of gravity for improved handling. Take the angle cut canister a distinct look that separates FMF from the pack. There is our exhaust port flange (full systems only) that transmits less vibration and puts less tension on the header. There is our proprietary muffler packing incorporating various substrates of wire mesh, high density fabrics and advanced sound absorption material FMF’s packing is arguably the best in the industry. Where others skimp, FMF beefs it up to give you unmatched reliability.

Anyone can make a bolt on system, but not anyone can give you the innovations and patent pending technology FMF offers or the quality from making each exhaust ourselves. FMF Racing is performance. Bolt on a Factory 4.1 and FEEL THE POWER!

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