CARB ADAPTER 4BBL TO 4BBL Any 4bbl carb. to any 4bbl manifold except Holley 4500 and OEM manifolds with exposed exhaust crossover tube. Measures 3/4' nominal height of the adapter only, w/o gaskets. Included in this kit are the gaskets, studs, nuts and washers. This easy to install adapter is made of diecast aluminum. Referenc: 1932 Description: .