Ski-doo HPG Shock package for the REV 2005-7 with SC4 (Make sure your 2005-7 REV has an SC-4 as many were SC-3) and 2008-1017 Xp 120" SC-5 models (will not fit SC3 or R-Motion). This is a "best bang for the buck" shock upgrade for your REV & MXZ SC4-5. These are the same shocks that come on the "X" package sleds. The remote ressy. rear shock has adjustable high and low speed compression damping and the front is a rebuildable HPG with threaded adjuster. This will smooth out the moguls and also works great with our heavy torsion spring kit.