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Home » Exhaust » 4-Stroke Exhaust » FMF » Factory 4.1 Slip-On Muffler

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Factory 4.1 Slip-On Muffler

$172.94 to $412.94
Retail Price $199.95 to $499.95

The Factory 4.1 is FMF Racing's premier performance exhaust. With 30 years of racing experience behind it, the Factory 4.1 takes advantage of everything we've learned on the race track.

Available in natural or blue anodized finish.
Horsepower gains throughout RPM range.
Available with titanium or high strength stainless steel midpipe.

Note: Honda CRF250R Dual slip-ons use stock midpipe

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