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This is a Larger Diameter STM Secondary for your Apex or Z1 conversion fits the Polaris RZR, XP-900, XP-1000 and Jagged-X...
STM Gen 2 Tuner Secondary Finned Fixed Sheave Assembly comes with sheave part# 2001090, post part# 2001014, rollers, pins, pin screws Fits 2013 Xp 900 Jagged X 2014-15 Polaris...