Factory4.1 SL (Slip-On) 044235 ext_Gnarly_Pipe • Dual layer face foam

•    Dual layer face foam manages sweat

Dyno and track tested for every application

-Enhanced sonic evacuation provides for higher flow and increased power

When looking to add 4-stroke tractor like torque to your 2-stroke and you need a pipe to withstand the harsh elements

-Includes O-rings on most models

Factory4.1 SL (Slip-On) 044235 ext_Gnarly_Pipe • Dual layer face foamThe 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