The 2.5" lift kit is designed to optimize the stock suspension while maximizing ground clearance and performance. This product is recommended to all 4x4 ATV's to prevent getting stuck on logs or in those nasty ruts. For use with aftermarket axles, axle spacers NOT included. NOTE: If using stock rims you will need wheel spacers on the rear. Fits: 2005-2017 Arctic Cat 400-1000H2 (TRV's included) Does not fit 2015+ Alterra, XT and XR models. Call if you have any questions.