Four-Hole bore manifold design 1 inch height. Manufactured from advanced phenolic thermostat plastic and engineered to withstand extreme high intake manifold temperatures. These spacers were designed to insulate and reduce heat flow to the carburetor keeping it cooler to allow a denser fuel mixture to enter the engine and produce more horsepower. Comes complete with gaskets, studs, nuts, and washers. Product Features:Advanced phenolic thermoset plasticWithstands extreme high temperaturesInsulates/reduces heat flowAllows denser fuel mixProduces more horsepower
