FMF Racing Factory Fatty Rev Pipe 025240Pipe focuses its power delivery in the middle and upper RPM of the power band If riders are running out of power up top, want more time between shifts and do a lot of deep berm or sand riding, the FMF Rev is their pipe of choice FMF Racings Tru Flo stamping process ensures a perfect fit and optimum performance Incredibly durable nickel plating Dyno and track tested for every application Includes O rings