MLS Exhaust Gaskets for LS Engines – Multi-Layer Steel Header Gasket Set
Upgrade your LS engine exhaust system with Certified Automotive Experts MLS Exhaust Gaskets, engineered to provide reliable sealing under high heat, vibration, and demanding performance conditions. Made from durable multi-layer steel (MLS), these LS header gaskets are designed for LS engine swaps, performance builds, exhaust repairs, and OEM replacement applications.
These MLS Exhaust Gaskets provide a strong, consistent seal between the exhaust manifold or header and the cylinder head, helping prevent exhaust leaks and maintain proper exhaust system performance. The multi-layer steel construction is designed to withstand the high temperatures and pressure commonly found around LS exhaust ports.
Whether you're installing LS swap headers, replacing a worn manifold gasket, or rebuilding a factory LS exhaust system, these multi-layer steel exhaust gaskets provide a dependable sealing solution for compatible GM LS engines.
Key Features
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MLS Exhaust Gaskets for compatible GM LS engines
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Multi-layer steel construction
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Designed for high-temperature exhaust applications
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Helps provide a reliable exhaust seal
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Helps reduce the risk of exhaust leaks
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Suitable for LS headers and exhaust manifolds
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Designed for LS swap and performance applications
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Suitable for OEM replacement applications
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Durable construction for long-term use
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Designed to withstand heat, vibration, and exhaust pressure
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Manufactured as a direct replacement for GM part number 12617944
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Package includes 2 MLS LS header gaskets
LS Engine Compatibility
These MLS Exhaust Gaskets are designed for a wide range of compatible GM LS-family engines, including:
Always verify the gasket dimensions, cylinder-head configuration, engine generation, and vehicle application before ordering.
What's Included
Why Choose MLS Exhaust Gaskets?
MLS Exhaust Gaskets are a popular choice for performance and OEM-style exhaust applications because their multi-layer steel construction provides a durable sealing surface designed to handle high exhaust temperatures and engine vibration.
A properly fitted exhaust gasket helps create a tight connection between the cylinder head and exhaust manifold or header. This is especially important for LS swap projects and performance builds where aftermarket headers can operate under demanding thermal conditions.
These LS exhaust gaskets are designed to provide a dependable sealing solution without sacrificing durability. They are suitable for replacing worn factory manifold gaskets, installing aftermarket LS headers, or completing an LS engine rebuild.
Ideal Applications
These MLS Exhaust Gaskets are suitable for:
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LS engine swaps
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LS performance builds
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LS header installations
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Exhaust manifold replacement
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Factory LS engine rebuilds
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Custom LS-powered vehicles
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GM LS exhaust repairs
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OEM replacement applications
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Performance exhaust systems
Common LS Exhaust Gasket Applications
These MLS Exhaust Gaskets can be used for a variety of LS exhaust-related applications, including:
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LS1 exhaust manifold gasket replacement
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LS2 exhaust gasket replacement
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LS3 exhaust manifold gasket applications
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5.3 exhaust manifold gasket replacement
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6.0 LS exhaust manifold gasket applications
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6.2 LS exhaust gasket applications
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LS swap exhaust gasket installation
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LS header gasket replacement
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Chevy LS exhaust manifold gasket replacement
MLS Exhaust Gaskets vs. Standard Exhaust Gaskets
The main advantage of MLS Exhaust Gaskets is their multi-layer steel construction. Instead of relying on a simple single-layer material, MLS gaskets use multiple steel layers designed to maintain sealing performance under heat, pressure, and vibration.
For LS performance engines and header installations, this durable construction can provide a reliable sealing solution for demanding exhaust environments. Proper surface preparation, correct gasket positioning, and manufacturer-recommended installation procedures remain important for achieving the best results.
Frequently Asked Questions
What are MLS Exhaust Gaskets?
MLS Exhaust Gaskets are multi-layer steel gaskets designed to create a durable seal between compatible LS cylinder heads and exhaust manifolds or headers. They are designed to withstand high exhaust temperatures, pressure, and engine vibration.
What engines do these LS exhaust gaskets fit?
These gaskets are designed for a wide range of compatible GM LS-family engines, including 4.8L, 5.3L, 5.7L, 6.0L, and 6.2L engines, along with various LS, LQ, and RPO-code applications.
Are these MLS gaskets suitable for LS swaps?
Yes. These MLS Exhaust Gaskets are suitable for compatible LS swap applications using headers or exhaust manifolds that match the gasket and cylinder-head configuration.
Are these LS header gaskets made from steel?
Yes. They are constructed using multi-layer steel designed for durability and high-temperature exhaust sealing.
How many MLS Exhaust Gaskets are included?
The package includes two multi-layer steel LS header gaskets.
What GM part number do these gaskets replace?
These gaskets are designed as a direct replacement for GM part number 12617944. Always verify your specific application before ordering.
Can these gaskets be used with aftermarket LS headers?
Yes, provided the header flange and exhaust-port configuration are compatible with the gasket.
Do MLS Exhaust Gaskets prevent exhaust leaks?
A properly fitted MLS gasket can help create a reliable seal and reduce the risk of exhaust leaks. Correct fitment, clean mating surfaces, proper installation, and appropriate fastener torque are also essential.
Are these gaskets suitable for a 5.3L LS engine?
Yes, these MLS Exhaust Gaskets are designed for compatible 5.3L LS applications. Confirm the exact cylinder-head and exhaust flange configuration before installation.
Are these gaskets suitable for 6.0L and 6.2L LS engines?
Yes, they are listed for compatible 6.0L and 6.2L GM LS applications. Verify the exact engine and header/manifold configuration before purchase.
Important Fitment Information
GM has used several LS-family and related engine configurations with different cylinder heads, exhaust ports, and gasket requirements. For this reason, engine displacement alone should not be used to determine fitment.
Before purchasing, confirm the engine family, cylinder-head configuration, gasket dimensions, exhaust manifold or header flange pattern, and applicable GM part number.
For the best installation results, use clean and undamaged mating surfaces and follow the header or exhaust manifold manufacturer's recommended installation and torque procedures.
