Fits 1965-1990 Chevrolet 396-454 Mark IV Big Block. Round Ports, 2.40 Inch 1965-mercury-marauder-esi4562616 500 in Long - 12

500 in Long - 12 Point Nuts - Chromoly - Black Oxide - Set of 12

375 in Base - 4 in Top - 6

Boost Gauge - Sport-Comp II - 0-100 psi - Mechanical - Analog - 2-1/16 in Diameter - Black Face - Each

5-inch 409 stainless steel tubing allows for maximum exhaust flow and durability

Fits 1965-1990 Chevrolet 396-454 Mark IV Big Block. Round Ports, 2.40 Inch 1965-mercury-marauder-esi4562616 500 in Long - 12Manufactured 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