Peak RPM Optimization: Designed to let the motor breathe and pull hard at peak power from 8

This muffler has special thermal barrier and internal packing that keeps it very cool on the outside

Big power that loves to rev

allowing for precise and easy tuning for any riding style

Our Engineering department started off analyzing the competition

STM Inner Primary Sheave / ProR Category_Default Category/SLED/Arctic Cat/600\/6000 Race Sled '08-16 Peak RPM Optimization: Designed toReplacement fixed sheave for the stock Pro R (4 Cylinder Models) Fixed sheave and post only Made from all billet components. No need to send in components from your stock primary. This is a drop in replacement for the OEM Primary clutch