Shopping Cart

Your cart is empty.

Your cart is empty.

Michigan Motorsports LS Multi-Layer Steel (MLS) Header Manifold Exhaust Gasket | Direct Replacement for GM 12617944 | High-Performance Seal for LS1 LS2 LS3 LS6 LQ4 LQ9 4.8 5.3 5.7 6.0 6.2 Engines

4.9 (9) Write Review
Free shipping on orders over $29.99

$22.99

$ 10 .99 $10.99

In Stock

About this item

  • Perfect Fitment for LS Engines: Specifically designed to fit GM LS-series engines, including LS1, LS2, LS3, LS6, LS7 and LQ-series platforms.
  • High-Performance Multi-Layer Steel (MLS) Construction: Designed for maximum durability and superior sealing, preventing exhaust leaks in high-temperature and high-performance applications.
  • Direct OEM Replacement: Precision-engineered to match GM OEM specifications for an easy, hassle-free installation. No modifications or special tools required, making it perfect for DIY enthusiasts and professionals alike.
  • Enhanced Sealing Performance: Multi-Layer construction provides exceptional resistance to blowouts and warping, even under high-stress conditions. Eliminates commons issues like exhaust leaks and noise.
  • Essential for LS Swaps, Performance Builds, and Maintenance: A must-have for engine rebuilds, header installations, and LS swap projects, offering superior sealing performance for high-output applications.


Product Description

Michigan Motorsports Exhaust Manifold Gaskets on White Background.

Precison. Performance. Protecton.

Sealed for Power, Built to Last - Michigan Motorsports MLS Gaskets.

Built for Performance and Durability

High-Quality MLS Construction: Designed with multi-layer steel for exceptional strength and heat resistance.
Precise Compatibility: Fits GM LS engines, including LS1, LS2, LS3, LS6, LQ4, LQ9 and much more! (4.8L, 5.3L, 5.7L, 6.0L, and 6.2L)
Leak-Proof Sealing: Prevents exhaust leaks, enhancing engine efficiency and reducing noise.
Perfect for Modifications: Ideal for high-performance headers, turbo setups, or LS swaps.
Long-Lasting Reliability: Built to endure the demands of high-performance applications and daily driving.

Precision Engineering Backed by Michigan Motorsports!

  • Premium Quality: Made from the highest-grade materials to exceed OEM standards.
  • Trusted Fitment: Specifically designed for LS engines to ensure a perfect fit.
  • Performance-Proven: Tested in real-world and high-performance conditions for unmatched reliability.
  • Hassel-Free Installation: Fits like OEM with no need for modifications, saving time and effort.
Fine Details of LS Exhaust Manifold Gasket on a white Background
Michigan Motorsports Exhaust Manifold Gaskets on White Background.

Michigan Motorsports MLS Gaskets

Material: Multi-Layer Steel

Heat Resistance: Extreme

Fitment: Perfect for LS Engines

Durability: Long-Lasting

Leak Prevention: 100% Leak Proof

Stock Composite Exhaust Manifold Gaskets

Standard Gaskets

Material: Single-Layer

Heat Resistance: Moderate

Fitment: Generic

Durability: Prone to Warping

Leak Prevention: Inconsistent

Backside of LS Exhaust Manifold Gaskets on White Background

Real Feedback From Real Enthusiasts

"I used these for my LS1 Swap, and they sealed perfectly. No leaks, even with aftermarket headers!" - Chris D.

"Replaced my old gaskets with these MLS ones. No more leaks and easy to install. Thank You!" -Mike R.

The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked.

mark collins
Reviewed in the United States on February 18, 2025
Best gasket
Gris
Reviewed in the United States on January 4, 2025
So far so good, running these on my 03 turbo cat eye
Fernando Solis
Reviewed in the United States on January 3, 2025
Great product Great price and would definitely purchase again 👍 👍
Mark Kirby
Reviewed in the United States on January 25, 2025
Not quite OEM quality but did seal the surfaces. No leaks!
brian smith
Reviewed in the United States on May 4, 2024
great gasket set, im very pleased
Bruce Cochrane
Reviewed in the United States on May 11, 2024
Fit like OE. Nice and thick MLS style. Would use again
Alexis
Reviewed in the United States on December 10, 2024
Amazing and have had no leaks with longtube headers! Buy these instead id the paper ones! These are a lot more reliable!
A.C
Reviewed in the United States on December 11, 2023
Seals very well should of bought this long time ago
frédéric
Reviewed in Canada on October 11, 2023
parfait