The plate is O-ringed on both sides sealing to the injector as well as the blower restraint. Included with the adpt. is grade eight mounting hardware and O-ring for both sides of the plate. Plate is black anodized for corrosion protection and to give your hot rod the stealth look.
Opening in plate is 10.250" x 4.375" and can be opened up by the racer if they have a larger opening in their blower. Bolts to all roots blowers that use the 13.250" on center bolt pattern.