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
Details
- BrandMichigan
- MaterialMulti-Layer
- Item Thickness0.04 Inches
- ColorSilver
- ManufacturerMichigan
Description
🔥 Seal your power, silence the leaks — drive with confidence!
- PRECISION OEM FIT - Seamless installation with zero hassle—perfect for pros and DIYers alike.
- LEAK PROOF PERFORMANCE - Eliminates exhaust leaks and noise, ensuring your engine runs smooth and loud.
- UNIVERSAL LS COMPATIBILITY - Fits LS1, LS2, LS3, LS6, LS7, LQ4, LQ9, and more—one gasket to rule them all.
- MULTI LAYER STEEL DURABILITY - Engineered to withstand extreme heat and pressure without warping or leaks.
- ESSENTIAL FOR HIGH OUTPUT BUILDS - The go-to gasket for LS swaps, header installs, and performance rebuilds.
Michigan Motorsports LS Multi-Layer Steel Header Manifold Exhaust Gasket is a direct OEM replacement designed for GM LS-series engines. Built with high-performance MLS construction, it offers superior heat resistance, durability, and leak prevention, making it essential for LS swaps, performance builds, and maintenance.
Specifications
| Manufacturer | Michigan Motorsports |
| Brand | Michigan Motorsports |
| Item Weight | 6.4 ounces |
| Product Dimensions | 17.5 x 3.5 x 0.5 inches |
| Item model number | 12617944 |
| Is Discontinued By Manufacturer | No |
| Manufacturer Part Number | J3400-02 |
Reviews
M**A
Proper gasket for these engines.
Packed well and fit perfectly. Also this is the correct style gasket for these engines. Not like the crap ones the auto parts stores keep on stock to sell and charge more for…
A**
Great for Lontubes No leaks!
Amazing and have had no leaks with longtube headers! Buy these instead id the paper ones! These are a lot more reliable!
A**L
Great
Work great as they are intended. Good value
M**S
Works
Best gasket
F**S
Great product Great price and would definitely purchase again 👍 👍
Great product Great price and would definitely purchase again 👍 👍
G**S
Working good on my turbo truck
So far so good, running these on my 03 turbo cat eye
B**E
LS Header/Manifold
Fit like OE. Nice and thick MLS style. Would use again
A**C
Works
Seals very well should of bought this long time ago
Common Questions
Trustpilot
1 month ago
1 week ago
Get the App
