Inboard & Sterndrive - Engine Parts

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 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).

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

Sold in Pairs

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

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 - 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.

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. 

Sold in Pairs

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

Mercury Racing 525 EFI, 600/662/700 SCI Series V8,  0.030" 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

Additional Details:

• Fits: MCM flywheel housing with Alpha and Bravo drives

Interchanges/Replaces

GLM

• 21040

Mallory

• 9-58000

Mercruiser Stern Drive

• 33149
• 865329A02
• 8M0103028
• 99297A1
• 99297A2