Great performance

This would allow you to tune down and still be able to safely continue your ride

Labor for shimming valves for the new cams

Easy to install

Holds peak RPM better

Pipe Stinger / Ski-Doo 850 Altitude:9000+ Great performanceThe industry's first changeable internal stinger for Ski Doo allows for adjustments for high low altitude or race application adjustments. Smaller stinger size will increase the pipe pressure and compensate for low pressure at high elevation. In race applications, a smaller stinger will cause the pipe to react much quicker and require less preheating of the pipe on a rev stand. 2" internal stinger (low altitude 0 6,000 ft) Part #: 01 214 L 1" internal