Used exhaust manifold spacer without butterfly valve for use on 1967 to mid 1968 Mercury Cougar, Mercury Cyclone, Ford Fairlane, and Ford Mustang with 390 or 427-4V engines. Straight factory used spacer. Most cars came equipped with a thermal spacer that often times gets frozen with time. No obstruction with this one.
Note - Does not fit the slightly larger 428CJ exhaust manifolds.
Ford part number C6OZ-9A427.