This carburetor gasket kit for 13 HP GX390 engines comes with three gaskets and a spacer/insulator. These may be used on numerous go-karts, power washers, and lawn& garden utility engines. This gasket kit may also fit carburetors for the GX340 11 HP engine.
The spacer/insulator is made of high-temperature phenolic plastic, and is impervious to the high manifold temperatures. This insulates and reduces the heat flowing into the carburetor to both keep it cooler and to allow a denser fuel mixture that produces more horsepower.