Ski-doo Mxz Rev Front Frame Suspension Cross Member Bulkhead 518325423 Gtx Gsx Posted March 19, 2024 by admin suspension. MAJOR front end upgrades on the Ski doo XMThe part number for this item is 518325423, which replaces part number 518323766 and 518324694, and it is a stock replacement part for all the models listed below. 2016 2015 2014 2013 (6). This item can be shipped to United States, Canada.