Accessories - Header / Manifold Gaskets

Extreme Duty Hi-Performance Exhaust Manifold Gaskets - Stock Square Port 454/502 Chevy - Sold in Pairs

These gaskets are graphite impregnated and designed to withstand the highest of temperatures on high horsepower applications. For those of you looking to do the job only once, insist on Hardin Marine Extreme Duty gaskets. Quite possibly the last gasket you'll ever need.

Sold in Pairs

Extreme Duty Hi-Performance Exhaust Manifold Gaskets - 2" Stock Round Port 454/502 Chevy- Sold in Pairs

These gaskets are graphite impregnated and designed to withstand the highest of temperatures on high horsepower applications. For those of you looking to do the job only once, insist on Hardin Marine Extreme Duty gaskets. Quite possibly the last gasket you'll ever need.

Sold in Pairs

Extreme Duty Hi-Performance Seaward / Cyclone Exhaust Manifold Gaskets - Stock Square Port 454/502/525 Chevy - Sold in Pairs

These gaskets are graphite impregnated and designed to withstand the highest of temperatures on high horsepower applications. Double drilled for both standard BBC and 525 applications. These gaskets are designed to be used with Hardin Marine's Seaward / Cyclone Exhaust Manifolds. Will work on other Big Block Chevy Manifolds as well. 

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Extreme Duty Hi-Performance Exhaust Manifold Gaskets - Large 2-1/8" Square Port 454/502 Chevy - Sold in Pairs

These gaskets are graphite impregnated and designed to withstand the highest of temperatures on high horsepower applications. For those of you looking to do the job only once, insist on Hardin Marine Extreme Duty gaskets. Quite possibly the last gasket you'll ever need. These gaskets are large 2-1/8" square port.

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Extreme Duty Hi-Performance D Port Exhaust Manifold Gaskets - 454/502/8.2L Chevy - Sold in Pairs - Replaces OEM Mercury #27-8M0065690

These gaskets are graphite impregnated and designed to withstand the highest of temperatures on high horsepower applications. For those of you looking to do the job only once, insist on Hardin Marine Extreme Duty gaskets. Quite possibly the last gasket you'll ever need. These gaskets are designed to be used in D port Exhaust applications. Replaces stock OEM Mercury #27-8M0065690

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Big Block Chevy Hurricane Header Exhaust Manifold Gasket - Large Round 2-1/4" Port - Sold in Pairs

These gaskets are Graphite Impregnated designed to withstand the highest of temperatures on high horsepower applications. For those of you looking to do the job only once insist on Hardin Marine extreme-duty gaskets. Quite possibly the last gasket you’ll ever need.

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Standard Duty Exhaust Manifold Gasket - 454/502 Chevy Round Port - Sold in Pairs

These are high quality original equipment style gaskets die cut to exacting size and shape for the perfect fit every time.

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525 / 600SCI / 700SCI Mercury Replacement Header Gasket - Sold in Pairs

These gaskets are Graphite Impregnated designed to withstand the highest of temperatures on high horsepower applications. For those of you looking to do the job only once insist on Hardin Marine extreme-duty gaskets. Quite possibly the last gasket you’ll ever need.

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BBC 2.20 Round Port Armor Core Exhaust Header Gaskets - Sold in Pairs

• Port Style: Round
• Gasket Material: Cometic Armor Core
• Port Height (in): 2.200 in.
• Port Width (in): 2.200 in.
• Thickness (in): 0.064 in.

The Cometic Armor Core High-Performance metal reinforced gasket material. Designed for sealing irregular surface flanges in high heat applications. It features a steel layer on one side with a graphite layer on the other and a fiber layer between. 649C (1200F).

BBC 1.900 x 1.850 Square Port MLS Exhaust Manifold Gaskets - Sold in Pairs

• Port Style: Stock
• Gasket Material: Multi-layer steel
• Port Height (in): 1.900 in.
• Port Width (in): 1.850 in.
• Thickness (in): 0.030 in.

The Cometic Severe Duty Multi Layer Series exhaust gaskets are comprised of three separate layers of stainless and steel. Cometic uses stainless steel for increased strength and its ability to rebound from heat compression, plus excellent corrosion resistance. The outer layers of the gasket are embossed and coated. This is designed to meet the demands of a variety of harsh sealing environments, load conditions and surface finishes.

The Severe Duty MLS exhaust gasket is ideal for both aluminum heads & cast iron heads as well as cast iron and aluminum blocks. The composition of MLS gaskets will also withstand the shearing forces created by aluminum heads on cast iron blocks. No re-torque is required and by design promotes an even torque load across the sealing surface.

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• Multi-Layered Steel (MLS) Marine Exhaust Gaskets are designed for extreme duty applications as well as high cylinder pressures produced by high horsepower applications. Perfect for high compression, super-charged, or turbo-charged,engines.
  
• Manufactured from three 304 stainless steel layers, resists corrosion, will not burn through or push out and maintains maximum fastener torque retention
• Stress formed inner and outer layer embossments act like springs that rebound under exhaust flange clamp load, creating force to seal excessive exhaust pressure produced from cylinder heads
• Withstands different combination's of cylinder head (aluminum) and exhaust header or manifold (steel) materials, will not deteriorate from scrubbing action caused by different expansion rates in aluminum and steel material

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Big Block Chevy Mercury 1050, 1075, 1200 MLS Exhaust Manifold Gaskets - Sold in Pairs

The Cometic Severe Duty Multi Layer Series exhaust gaskets are comprised of three separate layers of stainless and steel. Cometic uses stainless steel for increased strength and its ability to rebound from heat compression, plus excellent corrosion resistance. The outer layers of the gasket are embossed and coated. This is designed to meet the demands of a variety of harsh sealing environments, load conditions and surface finishes.

The Severe Duty MLS exhaust gasket is ideal for both aluminum heads & cast iron heads as well as cast iron and aluminum blocks. The composition of MLS gaskets will also withstand the shearing forces created by aluminum heads on cast iron blocks. No re-torque is required and by design promotes an even torque load across the sealing surface.

Sold in Pairs

Big Block Chevy 1.920 Round Port MLS Exhaust Manifold Gaskets - Sold in Pairs

The Cometic Severe Duty Multi Layer Series exhaust gaskets are comprised of three separate layers of stainless and steel. Cometic uses stainless steel for increased strength and its ability to rebound from heat compression, plus excellent corrosion resistance. The outer layers of the gasket are embossed and coated. This is designed to meet the demands of a variety of harsh sealing environments, load conditions and surface finishes.

The Severe Duty MLS exhaust gasket is ideal for both aluminum heads & cast iron heads as well as cast iron and aluminum blocks. The composition of MLS gaskets will also withstand the shearing forces created by aluminum heads on cast iron blocks. No re-torque is required and by design promotes an even torque load across the sealing surface.

Sold in Pairs

Mercury Racing 525 EFI, 600/662/700 SCI Series V8 MLS Exhaust Gasket - Sold in Pairs

These gaskets are designed to withstand the highest of temperatures on high horsepower applications. For those of you looking to do the job only once insist on Hardin Marine extreme-duty gaskets. Quite possibly the last gasket you’ll ever need.

These MLS exhaust gaskets are ideal for both aluminum heads & cast iron heads as well as cast iron and aluminum blocks. The composition of MLS gaskets will also withstand the shearing forces created by aluminum heads on cast iron blocks. No re-torque is required and by design promotes an even torque load across the sealing surface.

Sold in Pairs

Copperseal Exhaust Manifold Gaskets - Big Block Chevy Round Port- Sold in Pairs

Copperseal is the perfect for solving problems caused by uneven mating surfaces or warped flanges. Embossed raised seals fit perfectly to the exhaust ports. The resistance to high temperature and high pressure make the gaskets the ultimate choice for all applications. .04" thick.

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Copperseal Exhaust Manifold Gaskets - Big Block Chevy Square Port- Sold in Pairs

Copperseal is the perfect for solving problems caused by uneven mating surfaces or warped flanges. Embossed raised seals fit perfectly to the exhaust ports. The resistance to high temperature and high pressure make the gaskets the ultimate choice for all applications. .04" thick.

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Exhaust Gaskets for LS Marine Aluminum Exhaust Manifold System

Replacement Exhaust Gaskets for the 620-32940 or 620-32942 LS Exhaust Systems or IMCO LS Exhaust Systems. Sold in pairs for one engine.

GM Gen III/IV Small Block V8. LS Series .030" MLS Exhaust Gaskets. - Sold in Pairs

The Cometic Severe Duty Multi Layer Series exhaust gaskets are comprised of three separate layers of stainless steel. Cometic uses stainless steel for increased strength and its ability to rebound from heat compression, plus excellent corrosion resistance. The outer layers of the gasket are embossed and coated. This is designed to meet the demands of a variety of harsh sealing environments, load conditions and surface finishes.

The Severe Duty MLS exhaust gasket is ideal for both aluminum heads & cast iron heads as well as cast iron and aluminum blocks. The composition of MLS gaskets will also withstand the shearing forces created by aluminum heads on cast iron blocks. No re-torque is required and by design promotes an even torque load across the sealing surface.

Sold in Pairs

Extreme Duty Hi-Performance Exhaust Manifold Gaskets - 305/350 Chevy- Sold in Pairs

These gaskets are graphite impregnated and designed to withstand the highest of temperatures on high horsepower applications.  For those of you looking to do the job only once, insist on Hardin Marine Extreme Duty gaskets.  Quite possibly the last gasket you'll ever need.

Sold in Pairs