Fits 1965-1990 Chevrolet 396-454 Big Block. Round Ports, 1.85 Inch x 1.90 Inch GM Cars/Trucks " it will not re-activate the

it will not re-activate the disabled cruise control system or correct any codes that are set

New valves

Coupling hose allows for expansion

Bolt-On Ease: Designed for a hassle-free bolt-on installation

Fits 1965-1990 Chevrolet 396-454 Big Block. Round Ports, 1.85 Inch x 1.90 Inch GM Cars/Trucks " it will not re-activate theMr. Gasket Performance Header Gaskets are manufactured from a heavy duty high temperature material, . 062 inch thick, consisting of an acrylic binder system to resist high temperature. Provides excellent sealing and durability with maximum torque retention to eliminate gasket failure. While precision die cut for an excellent fit, it can be trimmed if necessary for modified port applications. For original equipment replacement, higher performance