Ultra-Seal Header Gaskets Fits 1965-1990 Chevrolet 396-454 Mark IV Big Block Square Port, 1.85 Inch x 1.90 Inch Mr Gasket Suspension - Leaf Springs - Leaf Spring Perches Stainless steel internals and powdercoated

Stainless steel internals and powdercoated black box

Designed by Rough Country's in-house Research and Development team

External Fan Included: No

Fits standard rotation 2015 and up Ford 8

Cab length rock slider

Ultra-Seal Header Gaskets Fits 1965-1990 Chevrolet 396-454 Mark IV Big Block Square Port, 1.85 Inch x 1.90 Inch Mr Gasket Suspension - Leaf Springs - Leaf Spring Perches Stainless steel internals and powdercoatedManufactured from high temperature steel core graphite faced exhaust material. Expanded steel core provides stability and maximum torque retention to eliminate Gasket failure. Graphite facing provides excellent heat resistance and thermal conductivity to transfer heat away from the cylinder head. Conforms to and seals minor surface irregularities. High recovery material allows header or manifold flange to stay sealed if flange loses clamp load. Can be