What material are these Edelbrock exhaust gaskets made from?

These gaskets are made from Edelbrock's EnCore HTX-900 material. It's a composite featuring graphite-coated, heat-resistant fiber sheets mechanically and chemically fused to an expanded steel core.

What is the port size of these gaskets?

The port size for these Edelbrock exhaust gaskets is 1.20 inches by 1.63 inches. This sizing is intended to match the exhaust ports on Buick 400-455 V8 engines.

What does the 50% recovery rate mean for my installation?

The 50% recovery rate means the gasket material can expand slightly to compensate if your header bolts lose some torque over time. This helps maintain a consistent seal and prevent exhaust leaks.

Edelbrock Buick 400-455 Exhaust Gasket Set

1 / 2

Specifications

Brand: Edelbrock
Part #: 7247
UPC: 85347072477

Edelbrock Buick 400-455 Exhaust Gasket Set

Name: Edelbrock Buick 400-455 Exhaust Gasket Set
Brand: Edelbrock
Price: 34.95 USD
Availability: InStock

$34.95

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Edelbrock exhaust gaskets for Buick 400-455 V8 engines. HTX-900 composite ensures a strong seal for your exhaust manifolds or headers.

Key Features

Fits 1967-1976 Buick 400, 430, and 455 V8 engines.
Constructed from EnCore HTX-900, a high-density non-asbestos fiber/metal core composite.
Features graphite-coated, heat-resistant fiber blended sheets fused to an expanded steel core.
Provides high heat resistance and excellent load retention for reliable sealing.
Offers a 50% recovery rate to maintain seal integrity if header bolts loosen.
Port size measures 1.20" x 1.63" for a precise fit on compatible exhaust manifolds and headers.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

Secure CheckoutFast Shipping631-982-0042

Will this fit your vehicle?

Product Details

If you're working on a classic Buick with a 400, 430, or 455 V8 from 1967 to 1976, getting a good seal on your exhaust manifolds or headers is key to performance and keeping exhaust fumes out of the cabin. These exhaust gaskets from Edelbrock are built to handle the heat and pressure of these big-block engines.

They're made from Edelbrock's EnCore HTX-900 material, which is a well-built composite of graphite-coated fiber sheets bonded to an expanded steel core. This construction gives them high heat resistance and excellent load retention, meaning they won't easily crush or leak under pressure. A notable feature is their 50% recovery rate, which helps maintain a seal even if your header bolts loosen up a bit over time. The port size is 1.20" x 1.63", designed to match the exhaust ports on these specific Buick V8s.

This set includes two gaskets, enough for one vehicle. They are designed to fit a range of Buick models from the late 60s and early 70s, including the Electra, Riviera, and Skylark.