Best Automotive Performance Header Gaskets in 2026

Meets or exceeds all original equipment specifications

Application specific design to ensure a perfect fit

Validated for fit

Head sets contain gaskets and seals necessary for a valve grind or head reconditioning job

Application specific design to ensure a perfect fit and premium seal

Premium quality parts you can trust

Enables you to build your own infinitely customizable gaskets

Made of a heat resistant tear resistant compressed fiber laminate

can be trimmed into any configuration to meet your exact specifications

Designed to custom-fabricate vehicle’s exhaust system

Made from flexible graphite

Can withstand high exhaust temperature

Nickel plated steel

Incudes two 3 in. to 2-1/2 inch reducers

Gaskets/hardware included

2 1/2" Header Collector Gasket---- The exhaust header collector gaskets are especially designed for SBC BBC 302 350 454, and fit all 2.5 inch collector with Triangle (3 Bolt Pattern). brand new, please confirm whether the product is suitable before purchasing

High Quality Copper---- The exhaust header collector gasket is made of finest .041’’ thick solid copper with impeccable durability performance, wear-resisting, anti-strike, anti-scratch, dust-proof and colorfast

Sealing Performance---- Embossed port ridge for a perfect leak-proof seal, no additional sealant is required. No more worry about leaky header blues

3" Header Collector Gasket---- The header collector gaskets are especially designed for SBC BBC 302 350 454 383, and fit all 3 inch collector with Triangle (3 Bolt Pattern). brand new, please confirm whether the product is suitable before purchasing

High Quality Copper---- The header collector gasket is made of finest .041’’ thick solid copper with impeccable durability performance, wear-resisting, anti-strike, anti-scratch, dust-proof and colorfast

Sealing Performance---- Embossed port ridge for a perfect leak-proof seal, no additional sealant is required. No more worry about leaky header blues

🔧 【High Quality Copper】:The exhaust header collector gasket made of 2.5" solid copper 0.41" thick with impeccable durability performance, wear-resisting, anti-strike, anti-scratch, dust-proof and colorfast.without included bolts

🔧 【Wide Applicability】:This 2 1/2" Header Collector Gasket are especially designed for SBC BBC 302 350 454, and fit all 2.5 inch collector with Triangle (3 Bolt Pattern).

🔧 [Excellent Sealing Effect]: The exhaust header collector gasket uses a durable composite O-shaped design to form a tight leak-proof seal, without additional sealant, and can seal perfectly every time.

Genuine Mr. Gasket product

Designed for performance

Made from quality materials

Rectangle Port Copper Header Exhaust Gaskets Reusable

Compatible With: Small Block Chevy 262 267 283 302 305 327 350 383 400

Made with Copper/High Temp Inlay to ensure maximum durability

BBK is your Number One Aftermarket Performance Brand in the USA - American Designed and Built

Premium Graphite Material Ensures Leak Free Seal Every Time

Port Matched For Optimum Flow of All Exhaust Headers

Remflex’s unique flexible graphite material has been proven for more than 30 years

1-1/8 inch width x 1-27 inch height Oval Port; Ford V8 - 289 ('63-'68), 302 ('69-'80), 1-1/8" x 1-27/32" Oval Port, Manifold or Headers, 2/Set

Remflex exhaust gaskets come in a standard 1/8 inch thickness and are designed to crush 50 percent allowing them to fill any pits or gaps in the flange surface up to 1/16 inch

Package dimensions: 11.43 cms L x 53.34 cms W x 54.61 cms H

Package quantity: 1

Product type: Auto Part

OEM Part Number: 12617944, 12558573, 12600530

Compatible with all LS series engines (except LS7) LS1 LM7 LR4 LQ4 LS6 L59 LQ9 LM4 L33 LS2 LH6 L92 L76 LY2 LY5 LY6 LC9 LFA LH8 LMG LS3 L98 L9H L20 L94 LZ1 L99 L96 LC8 L77

For GMC for Chevy for Pontiac for Hummer for Cadilac for Buick 1997-2020 4.8L 5.3L 5.7L 6.0L 6.2L 6.6L V8 Engines

Suitable For Port-Matching

Will Not Burn Or Blow Out

Re-Useable

Durable Material: These gaskets are made high-quality solid copper material, not easy to crack, durable for long time use

Direct Replacement: These exhaust collector gaskets are manufactured to original standards, direct replacement for your old or broken ones

Applicable Scope: The collector gaskets are suitable for all 2.5inch collector with Triangle (3 Bolt Pattern), especially designed for SBC BBC 302 350 454

Package Dimensions: 19.88 L x 1.45 H x 5.58 W (inches)

Package Weight : 5 pounds

Country of Origin : United States

Aluminum Reinforced Graphite Exhaust Manifold Gasket

Complete Hardware Kit for Installing Aftermarket Header to your Vehicle

Great for Replacement of Missing or Damaged Gaskets

COPO LS7-style exhaust header gaskets

Designed for high-temperature operation

Stamped metal shim gasket

BBK is your Number One Aftermarket Performance Brand in the USA - American Designed and Built

Premium Graphite Material Ensures Leak Free Seal Every Time

Port Matched For Optimum Flow of All Exhaust Headers