Product Description
MAHLE MS19398 exhaust manifold gasket set restores tight, leak-free sealing on 2001–2016 GM 6.6L Duramax (LB7/LLY/LBZ/LMM/LML). Built from multi-layer steel (MLS) to handle heat cycling and boost, this 2-piece set seals both banks to help recover lost spool, reduce soot streaking, and protect manifold flanges in daily, tow, and work-truck duty.
Fitment
- 2001–2016 Chevrolet/GMC 2500HD & 3500HD 6.6L Duramax (LB7, LLY, LBZ, LMM, LML)
- Also fits other 6.6L Duramax platforms where OE geometry matches
- Direct-fit MLS set for manifold-to-head; turbo/up-pipe gaskets not included.
What’s Included
- (2) Multi-Layer Steel (MLS) exhaust manifold-to-cylinder head gaskets — one full engine set (left & right banks)
Cross-Reference / OE Info
- GM OE: manifold-to-head pair for LB7/LLY/LBZ/LMM/LML years
- Material: Multi-Layer Steel (MLS)
Related MAHLE Items (Internal Links)
- MAHLE F31903 Exhaust Manifold to Up-Pipe Gasket – 01–16 Duramax
- MAHLE F32918 Up-Pipe to Turbo Gasket – 01–16 Duramax
- MAHLE GS33678 Turbo Mounting Gasket Set – 01–10 Duramax
- MAHLE GS33937 Turbo Mounting Gasket Set – 11–16 Duramax
- MAHLE 54598 Wave-Stopper Head Gasket (Right, Grade C) – 01–16 Duramax
Why MAHLE
- OE-grade MLS construction for clamp-load retention and heat-cycle stability
- Exact port geometry for quick installs and dependable sealing
- Trusted by fleet, work-truck, and performance diesel communities
Installation Notes
- Verify manifold flatness; resurface if out of spec
- Clean mating surfaces; torque fasteners in proper sequence to spec
- Consider new hardware; re-check torque after initial heat cycles
FAQ
Does MS19398 fit every 2001–2016 Duramax?
Yes—LB7, LLY, LBZ, LMM, and LML platforms are covered for manifold-to-head sealing.
Is this an MLS (multi-layer steel) gasket?
Yes, MLS for durability under high exhaust temps and pressure.
How many gaskets are in the set?
Two—one for each bank (left and right).
What’s the UPC/GTIN for MS19398?
UPC/GTIN-12: 027067720566.
Specifications for Mahle MS19398
| Attribute | Value |
|---|---|
| Brand | MAHLE |
| Part Number | MS19398 |
| UPC / GTIN | 027067720566 |
| Shipping Info | Ships from CPP Diesel; shipping calculated at checkout. Lightweight flat-pack (pair). |
| Country of Origin | Not specified |
| Prop 65 | This product can expose you to chemicals including lead and lead compounds, known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov. |
