Compatible with Holley® 4150/4160 Series Carbs. 1/2" Thick with 4-Hole Plenum Design and 1.467" diameter bores. Sold individually.; Carburetor Spacer designed for Holley® 4150/4160 Style Carburetors with 4-hole Plenum Design. Constructed of Laminated wood construction bonded together with resin forms a natural thermal barrier formulated to reduce heat conductivity 10 times greater than aluminum.;.
