Pirate Mfg 1/2" Ported Square Phenolic Carburetor Spacer Fits Edelbrock Holley SBC BBC Chevy V8 BRAND NEW 1/2" Phenolic Plastic Carb Spacer And Stud Kit For All Ported Square Bore Carburetors Includes: (1) 1/2" Phenolic Plastic Spacer, (2) Gaskets, (4) Bolts, (4) Washers, (4) Nuts Fits Holley, Edelbrock, Barry Grant (Demon), Chevy, Ford, Mopar and any other square bore carburetor