TEGIWA Thermal Intake Manifold Gasket. This gasket helps to reduce intake air temps by removing the direct metal on metal connection between the intake manifold and cylinder head. By placing this thermal gasket between the intake manifold and the cylinder head, you will help reduce the amount of heat soak the intake manifold normally absorbs from the cylinder head resulting in an increase in power. Made from PTFE - the ultimate thermo-plastic and manufactured in the UK using the latest water-cutting technologly. This will fit all inlet manifolds - OEM and aftermarket.