HMF 134243736186 Competition Exhaust: Polaris Outlaw 525: IRS Fits: 07-11 Slip On Elliptical Seat mounts Euro-Polished End Cap Equal Power: The Competition Series distributes power evenly throughout the entire RPM range Variable Sound: Three exhaust inserts are included to give the rider the ability to quickly change the power and sound according to the riding conditions Mechanical Core: The Competition Series uses a mechanical core to control exhaust pulses and set power levels where theyre needed.