Ultra-Seal Header Gaskets Fits 1965-1990 Chevrolet 396-454 Mark IV Big Block Round Ports, 2.15 Inch Mr Gasket

Part #: 5912

Manufactured 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 trimmed if necessary for modified port applications.For original equipment replacement, high performance street, drag race and oval track use.Has A Graphite Core W/ Steel Outer LayersGraphite Core Has Excellent Thermo-conductivityCoated With High Temp Silicone For SealingWill Not (brindle ) Or Indent Aluminum HeadsDetails:Collector Gaskets Included: NoEmission Code: 5Gasket Line: Ultra-SealMaterial: Ultra-sealPort Shape: RoundPort Size: 2.15Warranty: Manufacturer's Limited 90 Day Warranty

Features:

• Has A Graphite Core W/ Steel Outer Layers
• Graphite Core Has Excellent Thermo-conductivity
• Coated With High Temp Silicone For Sealing
• Will Not (brindle ) Or Indent Aluminum Heads

Exhaust Manifold / Header Gasket - Ultra-Seal - 2.150 in Round Port - Steel Core Laminate - Big Block Chevy - Pair