Edelbrock's exhaust manifold gaskets present high heat resistance, superb load retention and unequaled sealing function on exhaust manifold and header applications. They are made of Encore HTX-900, highly dense non-asbestos fiber, and metal core composite components composing of two graphite protected, heat resistant fiber blended sheets which are mechanically and chemically fused to an expanded stainless steel center. These are created from tough materials so motor vehicle owners will be able to use them for better durability.