Compatibility:Compatible with Holley Carb Chevy 4BBL SBC BBC 0.5.Compatible with Holley 4150/4160. Ported Design Spacers:Ported Design; Package list:Package Includes mounting hardware and gaskets. Thickness: 0.5",1/2 Phenolic material:Phenolic material is a type of plastic resin which has excellent insulating properties,Made of phenolic resin and engineered to reduce heat transfer from the intake manifold to the carburetor that provides a denser air/fuel mixutre for increased power and efficiency. Specification:
Condition:100% Brand New
Carburetor Type: Fits Holley 4150/4160 & AFB
Material: Phenolic Plastic
Finish: Black
Thickness: 0.50
Spacer Style: (4) 1-11/16" Ports