Best Square Automotive Replacement Header Gaskets in 2026

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

1-7/8" Diameter Round Port; Chevy V8 - 4.8L, 5.3L, 6.0L LS2 ('99-'08), 5.7L, LS1 LS6 ('97-'08), includes Vortec, Manifold or Headers, 2/Set

Port configuration comparable to Fel-Pro 1440

Heating and cooling of the exhaust system causes header and manifold flanges to warp resulting in gaps between the head and header which Remflex exhaust gaskets seal completely due to the thickness and compressibility of the 100 percent flexible graphite

1-1/8 inch width x 1-1/2" height Stock Square Port; Ford V8 - 302 ('81-'95), 351 ('69-'97) Windsor, 1-1/8" x 1-1/2" Square Port, Manifold or Headers, 2/Set

Heating and cooling of the exhaust system causes header and manifold flanges to warp resulting in gaps between the head and header which Remflex exhaust gaskets seal completely due to the thickness and compressibility of the 100 percent flexible graphite

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

【FIRMLY CLIP & 50X SHOCKPROOF】: Features a strong triangle support, an extendable chromed steel clip hook and a metal screw mechanical lock clasp, YRU car phone mount holds your phone tightly to the air vent and maintains the optimal viewing angle even on the bumpy road or sharp turn. Integration of up to 500+ competitors’advantages, 30000KM+ road test. Enabling you to drive in confidence

【INNOVATIVE DESIGN & EXTRA PROTECTION】Integrated with a locking reminder device that prevents from being overfastened, providing extra vents/mount protection. Steel Hook with chromed surface is more durable and has no sharp edges. Multi-layered silicone pads protect your phone and vent fins from being scratched

【360°ROTATION & ONE-HAND OPERATION】: With YRU phone holder, your cell phone can be adjusted to any view angle without blocking the vents.You can easily lay and remove the phone on the wide comfortable phone cradle with instant release button and just enjoy the best driving experience

Package Weight: 0.139 kg

Product Type: Auto Part

Package Quantity: 1

Designed to custom-fabricate vehicle’s exhaust system

Made from flexible graphite

Can withstand high exhaust temperature

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

Gasket for 4-2-1 headers

New M10 x 1.25 studs and nuts

2" (id) graphite donut gasket

Manufactured from high-temperature steel core/graphite faced exhaust material

Expanded steel core provides stability and maximum torque retention to eliminate gasket failure

Graphite impregnated facing provides excellent heat resistance and thermal conductivity to transfer heat away from the cylinder head

🔧 【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.

Water/Weather Resistant

Re-Useable

Multi-Layer "Dead Soft" aluminum conforms to create a leak-proof seal

▶️ Aluminum Reinforced Graphite Exhaust Manifold Gasket

▶️ Complete Hardware Kit for Installing Aftermarket Header to your Vehicle

▶️ Great for Replacement of Missing or Damaged Gaskets

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.

Package Dimensions :0.508 Cm L X14.605 Cm W X59.436 Cm H

Product Type :Auto Part

Country Of Origin :United States

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.

Precision fit for improved sealing

Steel core provides superior adhesion

Design constributes to exact fit between cylinder head and header to improve exhaust flow

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

Precision fit for improved sealing

Steel core provides superior adhesion

Design constributes to exact fit between cylinder head and header to improve exhaust flow

Precision fit for improved sealing

Steel core provides superior adhesion

Design constributes to exact fit between cylinder head and header to improve exhaust flow

Applicable models: 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 Don't forget to refer to the product description when purchasing to make sure the parameters in it match your vehicle!

Advantages: The dimensions and parameters of our products are precisely manufactured and produced according to the original accessories, accurate to the millimeter level, you can buy with confidence after referring to the description!

Installation method: The installation of this product is not complicated, you can search for relevant installation videos on the Internet, or send us a message after receiving the goods to provide you with installation tutorials and guidance programs!

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

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

2 Year Warranty (This product must be installed by a certified professional mechanic)

Same day shipping when purchased before 3pm EST

Our products are tested and meet or exceed OEM performance requirements

Complete engine sealing with PCE exhaust gaskets.Properly sealing an engine is paramount to making maximum horsepower.PCE exhaust manifold gaskets are designed to give your manifold and;headers an exact seal with their composite material construction.

355 Exhaust Header and Manifold Gasket

Speedmaster creates unique & distinctive DNA items inspired by the blend of old and new technology. Its empowered work forced drives innovation not only in the products it sells but with the way it goes about doing it.

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