Gaskets & Seals - Exhaust Header Gaskets

429-460 Ford MLS Exhaust Manifold Gaskets
Your Price:
$45.99

429-460 Ford MLS Exhaust Manifold Gaskets

302-C5900-030

429-460 Ford MLS Exhaust Manifold 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


455 Oldsmobile MLS Exhaust Manifold Gaskets
Your Price:
$44.99

455 Oldsmobile MLS Exhaust Manifold Gaskets

302-C5904-030

455 Oldsmobile 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


525 Mercury Replacement Header Gasket
Your Price:
$29.99

525 Mercury Replacement Header Gasket

755-6907

525 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.

Sold in Pairs


BBC 1.900 x 1.850 Square Port MLS Exhaust Manifold Gaskets
Your Price:
$39.99

BBC 1.900 x 1.850 Square Port MLS Exhaust Manifold Gaskets

302-C5897-030

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.

Sold in Pairs


BBC Hurricane Header Exhaust Manifold Gasket - Large Round 2-1/4" Port
Your Price:
$29.99

BBC Hurricane Header Exhaust Manifold Gasket - Large Round 2-1/4" Port

300-1412

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.

Sold in Pairs


Big Block Chevy 1.920 Round Port MLS Exhaust Manifold Gaskets
Your Price:
$44.99

Big Block Chevy 1.920 Round Port MLS Exhaust Manifold Gaskets

302-C5896-030

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


Big Block Chevy Mercury 1050, 1075, 1200 MLS Exhaust Manifold Gaskets
Your Price:
$59.99

Big Block Chevy Mercury 1050, 1075, 1200 MLS Exhaust Manifold Gaskets

302-C5820-051

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 Round Port SS Exhaust Gaskets
Your Price:
$44.99

Big Block Chevy Round Port SS Exhaust Gaskets

655-4815

Big Block Chevy Round Port SS Exhaust Gaskets -Sold Each

  • 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

Sold Each


Big Block Chevy Square Port SS Exhaust Gaskets
Your Price:
$34.99

Big Block Chevy Square Port SS Exhaust Gaskets

655-4816

Big Block Chevy Square Port SS Exhaust Gaskets-Sold in Pairs

  • 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

Sold in Pairs


Copperseal Exhaust Manifold Gaskets - Big Block Chevy Round Port
Your Price:
$59.99

Copperseal Exhaust Manifold Gaskets - Big Block Chevy Round Port

300-7507

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.

Sold in Pairs


Copperseal Exhaust Manifold Gaskets - Big Block Chevy Square Port
Your Price:
$59.99

Copperseal Exhaust Manifold Gaskets - Big Block Chevy Square Port

300-7508

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.

Sold in Pairs


Copperseal Exhaust Manifold Gaskets - Olds 350-455
Your Price:
$39.99

Copperseal Exhaust Manifold Gaskets - Olds 350-455

300-7530

Copperseal Exhaust Manifold Gaskets - Olds 350-455- 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. Ports are 1.900" tall and 1.450" wide.

Sold in Pairs


Copperseal Exhaust Manifold Gaskets - Small Block Chevy Round Port
Your Price:
$39.99

Copperseal Exhaust Manifold Gaskets - Small Block Chevy Round Port

300-7504

Copperseal Exhaust Manifold Gaskets - Small 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.

Sold in Pairs


Copperseal Exhaust Manifold Gaskets - Small Block Chevy Square Port
Your Price:
$49.99

Copperseal Exhaust Manifold Gaskets - Small Block Chevy Square Port

300-7505

Copperseal Exhaust Manifold Gaskets - Small 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.

Sold in Pairs


Extreme Duty Hi-Performance Exhaust Manifold Gaskets - 305/350 Chevy
Your Price:
$29.99

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

300-1404

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


Extreme Duty Hi-Performance Exhaust Manifold Gaskets - 429-460 Ford
Your Price:
$29.99

Extreme Duty Hi-Performance Exhaust Manifold Gaskets - 429-460 Ford

300-1419

Extreme Duty Hi-Performance Exhaust Manifold Gaskets - 429-460 Ford - 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

Port Style:Oval

Gasket Material: Steel core laminate

Port Height (in): 2.170 in.

Port Width (in): 1.300 in.


Extreme Duty Hi-Performance Exhaust Manifold Gaskets - 454/502 Chevy
Your Price:
$29.99

Extreme Duty Hi-Performance Exhaust Manifold Gaskets - 454/502 Chevy

300-1410

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 - 454/502 Chevy
Your Price:
$29.99

Extreme Duty Hi-Performance Exhaust Manifold Gaskets - 454/502 Chevy

300-1411

Extreme Duty Hi-Performance Exhaust Manifold Gaskets - 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 Exhaust Manifold Gaskets - 455 Olds
Your Price:
$29.99

Extreme Duty Hi-Performance Exhaust Manifold Gaskets - 455 Olds

300-1439

Extreme Duty Hi-Performance Exhaust Manifold Gaskets - 455 Olds - 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 - 454/502 Chevy
Your Price:
$29.99

Extreme Duty Hi-Performance Seaward Exhaust Manifold Gaskets - 454/502/525 Chevy

300-1413

Extreme Duty Hi-Performance Seaward 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 Exhaust Manifolds. 

Sold in Pairs


GM Gen III/IV Small Block V8. LS Series .030" MLS Exhaust Gaskets.
Your Price:
$31.99

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

302-C5818-030

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


Small Block Chevy Adapter Plate Header Gasket Kit
Your Price:
$39.99

Small Block Chevy Adapter Plate Header Gasket Kit

510-5203

Small Block Chevy Adapter Plate Header Gasket Kit

This gasket kit is used with Small Block Chevy Bassett or Rewarder Headers adapter plates. When replacing the gaskets on a Small Block Chevy Basset or Rewarder Header, you'll need this and a standard Small Block Chevy Exhaust Gasket, so we created a kit package that includes all four gaskets. These are high quality original equipment style gaskets die cut to exacting size and shape for the perfect fit every time


Small Block Chevy Lightning Header Adapter Gaskets
Your Price:
$29.99

Small Block Chevy Lightning Header Adapter Gaskets

310-40414

Small Block Chevy Lightning Header Adapter Gaskets- Sold in Pairs

Designed to be used with the adapter plates on SBC Lightning Headers.

Sold in Pairs

Standard Duty Exhaust Gasket - 429-460 Ford
Your Price:
$16.99

Standard Duty Exhaust Gasket - 429-460 Ford

655-259

Standard Duty Exhaust Gasket - 429-460 Ford - Sold in Pairs

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

Sold in pairs


Standard Duty Exhaust Manifold Gasket - 454/502 Chevy Round Port
Your Price:
$12.99

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

655-152

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.

Sold in Pairs