These will fit the following models. 2007 MXZ X 550 Fan.The item "SKI-DOO REV CHASSIS STIFFER REAR SUSPENSION SPRINGS 503191251, 503191253" is in sale since Thursday, March 7, 2019. This item is in the category "eBay Motors\Parts & Accessories\Snowmobile Parts\Shocks & Suspension". The seller is "kdksports" and is located in Rome, New York. This item can be shipped to United States, Canada.