This is a Fox Rear Shock Kit for all Ski-doo R-motion MXZ 2013-17, Renegade 2013-17, and Freeride 137" 2014-2017. This kit has a Fox 1.5 ZERO C2 Center shock with dual speed compression adjustments and includes an adjustable compression coil spring. The rear shock is a Fox 2.0 ZERO RC2 with dual speed compression and fully adjustable rebound. This gives you far more adjustment than all but the best overpriced (KYB 40 factory shock package at $2499) at a great price. Choose your length of suspension and you will receive the correct shock package.