Factory4.1 SL (Slip-On)
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.
-94dB Insert Included