Fits 4150 and 4160 series Holley carbs. Plastic / Phenolic carburetor spacers reduce the fuel temperature inside the carburetor by insulating the carb from the hot intake manifold. This results in a denser air/fuel mixture for more power.
Holley Edelbrock AFB 2" Plastic 4 Brl Open Square Flange Carb Carburetor Spacer
2" Tall Plastic Air Cleaner Riser, Spacer, 4 Brl 5-1/8" Opening Holley Edelbrock
Holley Edelbrock 4 Brl Ported 1/2" Tall Phenolic Heat Spacer W/ Gaskets & Studs
Holley Edelbrock AFB 4 Brl Ported 1/2 inch Thick Phenolic Carburetor Heat Spacer
Q-Jet Spread Bore 4 Brl 4 Hole 1 inch Thick Phenolic Carburetor Heat Spacer
Holley Edelbrock AFB 4 Brl 4 Hole 1 inch Thick Phenolic Carburetor Heat Spacer 1
