Universal turbo internal wastegate actuator RB20. . Actuator arm rod length: 2.0" long from end to hole center . Rod hole size: 7.5 mm ID x 5.0 mm thickness . Arm adjustable distance from 4 1/4" to 5 1/4" from bolt face to rod hole center . Pressure is adjusted between 7 psi - 26 psi . Mounting bracket bolt distance: 1 5/16" bolt center to center