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

**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

## Details

- **Price:** 145.23 CAD
- **Vendor:** Doug's Headers
- **Type:** Exhaust Gaskets
- **Tags:** Doug's Headers, Exhaust Gaskets, HG9342

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 145.23 CAD | In stock |

## Images

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

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/dougs-headers-hg9342-d-port-header-flange-gaskets-compressed-fiber-laminate-pair)
> Updated: 2026-11-07