Product Description
MAHLE 54598 is the RIGHT-SIDE (passenger) Grade C, 1.05 mm Wave-Stopper multi-layer steel (MLS) head gasket for the 2001–2016 GM 6.6L Duramax (LB7/LLY/LBZ/LMM/LML). Built with MAHLE’s patented Wave-Stopper fire-ring design, it delivers OE sealing reliability under high cylinder pressures. Cylinder head bolts are not included.
- Position: Right bank (passenger side)
- Thickness: Grade C (1.05 mm)
- Construction: Multi-Layer Steel (MLS) with Wave-Stopper combustion seal
- Application range: 2001–2016 Duramax LB7, LLY, LBZ, LMM, LML
- Warranty: 1-Year Limited
Fitment
- Chevy Silverado/GMC Sierra 2500HD & 3500/3500HD, 2001–2016, 6.6L Duramax LB7, LLY, LBZ, LMM, LML
Cross Reference Numbers
- GM: 12637788 (Grade C, Right)
- MAHLE: 54598
- GTIN/UPC: 027067723550
Technical Notes
- Wave-Stopper concentric wave layer around the combustion chamber adapts to varying loads/pressures for superior sealing.
- Pair with quality new head bolts or studs and follow proper RA/surface finish specs for MLS gaskets.
FAQ
Does this fit my Duramax?
Yes—this is the RIGHT-side Grade C (1.05 mm) gasket for 2001–2016 LB7/LLY/LBZ/LMM/LML.
Is this an MLS gasket with Wave-Stopper?
Yes—MAHLE’s Wave-Stopper MLS design provides OE-level sealing under high pressure.
Are head bolts included?
No—order head bolts or studs separately.
What’s the OEM cross-reference?
GM 12637788 (Grade C, Right). Use this to confirm parts catalog fitment.
