Product Details:

Sold as a pair , these gaskets are constructed from a specially formulated compressed fiber laminate material that is extra-thick for superior sealing performance and long-term durability.

Key Features:

• High-temperature rated: Withstands continuous exhaust heat up to 1,100°F
• High-pressure rated: Handles exhaust pressures up to 3,700 psi (255 bar)
• D-Port design: Engineered for an exact port match with Doug's Headers for Pontiac V8 engines
• Material: Extra-thick compressed fiber laminate construction for a reliable, long-lasting seal
• Sold as a pair: Includes gaskets for both cylinder heads

These header flange gaskets are purpose-built to complement Doug's Headers exhaust systems, ensuring optimal sealing performance even under the demanding conditions of high-performance and race applications. The D-port shape matches the exhaust port configuration of Pontiac 326–455 cubic inch V8 engines.

Products specifications:

Fits: Pontiac GTO 1965-66, 1968-73, Firebird 1967-79, Grand Prix 1965-77, Grand Am 1973-75, LeMans 1965-77, Catalina 1965-78, Tempest 1965-70, Ventura 1972-76, Grandville 1971-75, Star Chief 1965-66, Executive 1967-70, Grand LeMans 1975-77 + 3 more models

Gasket Material: Compressed fiber laminate

Port Style: D-port

Quantity: Sold as a pair.

EmissionFullDES: N - This Product is Certified by the Manufacturer as being a Non Emissions Sensi

Prop 65: Yes

FAQ

What part number is this?
The listed part number is HG9342.

Should I confirm product specifications before ordering?
Yes. Compare the original product specifications with the information supplied.

Common Searches

• Doug's Headers HG9342
• HG9342 D-Port Header Flange Gaskets Compressed Fiber Laminate Pair
• Doug's Headers D-Port Header Flange Gaskets Compressed Fiber Laminate Pair