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
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At a glance
- Condition
- New
- Color
- Silver
- Material
- Multi-Layer Steel
- Item Thickness
- 0.04 in
- Part Number
- J3400-02
Features 5
- 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.
Description
Our mission is to sell the highest quality, most affordable LS/LT swap products on the market. Our fantastic service team and sales staff with over 60 years of combined experience make us an excellent resource for LSx/LTx products! "The only thing faster than our shipping is an LS." Orders placed before 3pm est are shipped from our facility in Niles, Michigan, THE SAME DAY! Michigan Motorsports is a leading performance parts supplier specializing in LS and Gen V LT engine components. We offer high-quality camshafts, valvetrain parts, harnesses, and accessories for street and race builds. We’re gearheads first—offering expert knowledge, real-world testing, and unmatched service to help every builder succeed. Michigan Motorsports was founded by enthusiasts driven to make premium LS & Gen V LT parts more accessible and affordable to every builder out there. Sealed for Power, Built to Last - Michigan Motorsports MLS Gaskets. Material: Multi-Layer Steel Heat Resistance: Extreme Fitment: Perfect for LS Engines Durability: Long-Lasting Leak Prevention: 100% Leak Proof Material: Single-Layer Heat Resistance: Moderate Fitment: Generic Durability: Prone to Warping Leak Prevention: Inconsistent "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.
Specs 11
| Brand | Michigan Motorsports |
|---|---|
| Material | Multi-Layer Steel |
| Item Thickness | 0.04 inches |
| Color | Silver |
| Manufacturer | Michigan Motorsports |
| Brand Name | Michigan Motorsports |
| Number of Items | 2 |
| Model | 12617944 |
| Part Number | J3400-02 |
| Part Interchange Info | 12617944 |
| Material Type | Multi-Layer Steel |
No specs match.
Frequently asked questions
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