The Moroso 4150/4160 carburetor spacer is an open-plenum, 1/2-inch phenolic spacer designed for 4150/4160-style carburetors. It increases plenum volume with an open design while providing the thermal isolation benefits of phenolic material, suitable for installations that use a half-inch phenolic spacer on 4150/4160 flanges.
Moroso 4150/4160 Carburetor Spacer - Open Plenum - 1/2in - Phenolic