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Your cart is empty.Adds preload and effective rate to rear torsion springs. Allows for more accurate ride height setup. Increases efficiency of rear torsion springs.This item fits the following vehicle applications:compatible with Ski-Doo Freeride E-TEC 800R 146 2014-2017compatible with Ski-Doo Freeride E-TEC 800R 154 2014-2017compatible with Ski-Doo Freeride E-TEC 850 146 2018-2019compatible with Ski-Doo Freeride E-TEC 850 154 2018-2019compatible with Ski-Doo Freeride E-TEC 850 165 2018-2019compatible with Ski-Doo Freeride S-38 E-TEC 850 154 2018-2019compatible with Ski-Doo MX Z X-RS E-TEC 800R 2017compatible with Ski-Doo Renegade Backcountry E-TEC 600 HO 2016-2018compatible with Ski-Doo Renegade Backcountry E-TEC 800R 2016-2017compatible with Ski-Doo Renegade Backcountry X E-TEC 800R 2016-2017compatible with Ski-Doo Summit Burton E-TEC 800R 2016-2017compatible with Ski-Doo Summit SP E-TEC 600 HO 146 2014-2018compatible with Ski-Doo Summit SP E-TEC 600 HO 154 2014-2018compatible with Ski-Doo Summit SP E-TEC 600R 146 2019compatible with Ski-Doo Summit SP E-TEC 600R 154 2019compatible with Ski-Doo Summit SP E-TEC 800R 146 2013-2017compatible with Ski-Doo Summit SP E-TEC 800R 154 2013-2017compatible with Ski-Doo Summit SP E-TEC 800R 163 2013-2016compatible with Ski-Doo Summit SP E-TEC 850 146 2018-2019compatible with Ski-Doo Summit SP E-TEC 850 154 2018-2019compatible with Ski-Doo Summit SP E-TEC 850 165 2018-2019compatible with Ski-Doo Summit SP E-TEC 850 175 2018-2019compatible with Ski-Doo Summit SP T3 Package E-TEC 800R 154 2016compatible with Ski-Doo Summit SP T3 Package E-TEC 800R 163 2016compatible with Ski-Doo Summit SP T3 Package E-TEC 800R 174 2016compatible with Ski-Doo Summit Sport 600 Carb 2014-2019compatible with Ski-Doo Summit Sport Power TEK 800R 2014-2016compatible with Ski-Doo Summit X E-TEC 800R 146 2013-2015compatible with Ski-Doo Summit