Factory4.1 SL (Slip-On) 041291 Size:OS -Can be used with FMF

-Can be used with FMF or stock silencer (unless noted)

•    Self-cleaning canister with integrated film wipe reduces mud build up

The Factory Fatty is reminiscent of the “works” or cone pipe once used by Factory Teams

this system delivers a significant reduction in weight while improving overall power and throttle response

Factory4.1 SL (Slip-On) 041291 Size:OS -Can be used with FMFThe 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. 94dB Insert Included