1" Phenolic / Bakelite Carburetor Spacer Square Bore 4 Port The air flowing under the

The air flowing under the plenum provides a cooler charge for the incoming air with less heat transfer from the engine

As the horsepower in your performance vehicle goes up so does the strength of the read end housing

The Speedmaster valve locks will fit any Speedmaster 10 degree retainer and are recommended for all race applications due to their superior strength

They're designed to be installed with no modifications

Flat rubber bases with molded-in velocity stack type radius and step for smooth bore down from element to tube

1" Phenolic / Bakelite Carburetor Spacer Square Bore 4 Port The air flowing under theThe precise design of these Speedmaster carburetor spacers provides a smooth transition of fuel from the carburetor to the intake manifold, to increase flow for more performance. They also help to insulate the carburetor from engine heat and provide clearance for linkages.