Function-Formed™ style milled from 6061 T-6 aluminumLow-Profile design features allow maximum exhaust clearanceStainless steel bolts and gasket included12-point stainless steel ARP bolts and gasket included1-1/8'' diameter piston includedLarge 5/16''-24 bleeder screw for durabilityKit includes actuator rod with bearings, center rod, clutch adjuster and plate with retaining ring, and M8 hydraulic line adaptorMade in the USADesigned for use on M8 models with OEM hydraulic clutch as well as M8 models being converted to a hydraulic clutch. Will require the use of a 15mm bore master cylinder.