Clamp adapter allows the racer to use a over center stainless clamp or if holding a drive off the front of the engine a billet clamp. Adapter uses four 1/4" bolts that mount the adapter to the cover or fuel pump extension using the industry standard four bolt fuel pump pattern. Backside of the drive has a 2.120" x .120" male register and front 2.120" x .120" female register for the fuel pump or front drive to register in keeping everything running concentric to the camshaft. Wafer is .380" thick, from mount surface to mount surface and .500" overall.
This part is billet aluminum and is O-ringed on the back side for a leak-free installation. Mounting hardware is included.