Factory4.1 SL (slip-on)
FOR CLOSED COURSE COMPETITION USE ONLY. NOT INTENDED FOR STREET USE.
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
- Notice: For Closed Course Competition Use Only. Not Intended for Street Use.