OE Number:30530AA020/30534AA001/30539AA000/30530AA021/30531AA220/30542AA040Fitmentfor Subaru Baja 2003-2006for Subaru BRZ 2013-2025for Subaru Forester 1998-2018for Subaru Crosstrek 2013-2023for Subaru Impreza 2000-2023for Subaru Legacy 1997-2017 (non turbo)for Subaru Outback 1997-2017 (non turbo)Specification of Slave Cylinder BootMaterial: Steel, RubberInclude 1x Clutch Release Fork 30531AA220, 1x Clutch Boot 30542AA040, 1x Clutch Spring 30534AA001, 2x Clutch Spring 30539AA000.This is non-oem product, accessory only.Function of Release Fork Cylinder SleeveDust Prevention and Sealing: Isolate the clutch release fork from the external environment, creating a sealed area to prevents dust/dirt/moisture/road debris from entering the clutch housing.