Direct bolt-on OE replacement product designed to improve the hydraulic systems durability and increase the rider's connection to the engine Manual Slave Cylinders feature hard anodized billet aluminum housing with a durable piston and seal design Designed for use with OE or aftermarket manual clutch systems Not compatible with Rekluse auto clutches Race proven, durable piston and seal design Optimized return spring ensures lever consistency Improved clutch modulation. SLV CYL KTMHQ 450/501/690