Mr. Gasket Ultra-Seal Header Gaskets - D-Port - SB Chevy 102582 or for Accusump input

or for Accusump input

Internal bypass regulator is set at 12-psi

Not just from your headers

4130 Chromoly Steel

1973-1981 Pontiac Catalina

Mr. Gasket Ultra-Seal Header Gaskets - D-Port - SB Chevy 102582 or for Accusump inputUltra Seal exhaust gaskets are manufactured from hi temp 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 and can be reused many times. Can be trimmed if necessary for modified ports.