What makes Multi-Layer Steel (MLS) gaskets better for high-performance engines?

MLS gaskets are made of multiple steel layers that can withstand higher temperatures and pressures compared to single-layer gaskets. They are also designed to maintain their shape and seal under extreme cylinder pressures, preventing leaks.

Do I need to use any sealant with this Cometic exhaust gasket?

No, this Cometic MLS exhaust gasket does not require any sealants. Its multi-layer steel construction is designed to create a tight seal on its own, even with different combinations of cylinder head and exhaust manifold materials.

What is the significance of the .030" thickness?

The .030-inch thickness is a specific dimension for this gasket, often chosen to optimize compression and sealing for certain Big Block V8 engine configurations. It's designed to work effectively with the port size and engine's requirements.

Cometic GM BBC 2.250in Round Port - 030in MLS Exhaust Gasket

Specifications

Brand: Cometic Gasket
Part #: C5251-030
UPC: 191070061821

Cometic GM BBC 2.250in Round Port - 030in MLS Exhaust Gasket

Name: Cometic GM BBC 2.250in Round Port - 030in MLS Exhaust Gasket
Brand: Cometic Gasket
Price: 46.80 USD
Availability: InStock

$46.80

On Backorder

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Cometic GM BBC .030in MLS Exhaust Gasket. Fits many Big Block V8s and requires no sealants.

Key Features

Fits 104+ vehicle make/model combinations.
Constructed from .030" Multi-Layer Steel (MLS) for extreme temperature resistance.
Features a 2.250" round port opening.
Designed to withstand extreme cylinder pressures and maintain a torque set.
Resists corrosion and will not burn through or push out.
No sealants are required for installation.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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Will this fit your vehicle?

Product Details

When you're rebuilding the exhaust system on your Chevrolet Mark-IV or GM Gen-V/VI Big Block V8, getting the right gasket is crucial for a leak-free seal. This Multi-Layer Steel (MLS) exhaust gasket from Cometic is built to handle the high heat and pressure these engines can produce. It features a 2.250-inch round port opening and a .030-inch thickness, designed to maintain its seal even under extreme cylinder pressures.

Cometic's MLS gaskets are well-made from steel layers that resist corrosion and won't burn through or push out like some other materials. They are designed to maintain their torque set, meaning they stay tight and won't loosen up over time. Because of their construction, no sealants are needed, simplifying your installation process. This gasket is designed to work with different combinations of cylinder head and exhaust manifold materials, making it a solid option for a variety of Big Block builds.