Best Mr Gasket Performance Header Gaskets in 2026

Meets or exceeds all original equipment specifications

Application specific design to ensure a perfect fit

Validated for fit

Meets or exceeds all original equipment specifications

Application specific design to ensure a perfect fit

Engineered for the sealing repair environment

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

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

Fit for : SBC Header Gaskets Fits for SB 283-327-350-383-400 engines.

Fit for : SBC Header Gaskets Fits for SB 283-327-350-383-400 engines.

Fit for : SBC Header Gaskets Fits for SB 283-327-350-383-400 engines.

1-3/4" Round Port; Chevy V8 - 396, 402, 427, 454 ('65-'90), 1-3/4" Round Port, For Raised Weld Bead Headers, 2/Set

There are no rubber binders or composite materials in Remflex exhaust gaskets so they will not shrink or harden due to time or temperature eliminating the need to go back and continually retighten your flange bolts

For use with raised weld bead headers; additional sealing material is provided around the weld bead to provide a better seal

Applicable models ---- Each time you use a coated O-ring design to create a tight leak-proof seal, suitable for SB Chevy 283-327-350-383-400 engine, please check the car model before buying, avoid buying the wrong one.

Excellent material ---- Header Exhaust Gasket Seal is made of high-quality solid copper material. It has great durability, is firm and not easy to crack.

Reusable ---- Exhaust Manifold Gasket Set is a partial component. It is flexible and can be reused. It does not require a sealant. It can adjust the fixed length according to actual needs and has good performance.

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

Designed to deliver trouble-free, consistent performance

Right for your vehicle and lifestyle

Made from high-quality materials for ultimate durability

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

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

Package Weight : 5 pounds

Country of Origin : United States

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

Exhaust Header Gasket

Compatible with a 2 1/2" 3-bolt style header collector.

High Temp 2.5" 3 Bolt Style Header Exhaust Gasket

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