Cometic Fordc 6.7L Power Stroke .030in Exhaust Manifold GasketCometic Gasket Inc. Exhaust Gaskets are designed to be used with manifolds or headers. Offered in a range of materials to make sure you are covered with any cylinder head and manifold header combination. All exhaust gaskets are designed to be used without the use of messy sealants. Withstands different combinations of cylinder head and manifold materials Will not burn through or push out Maintains a torque set Requires No Sealants Corrosion resistant