Product Description
Seal your 6.6L the right way with the MAHLE 54598 Wave-Stopper® Right-Side Head Gasket (Grade C, 1.05 mm). Purpose-built MLS construction and Mahle’s Wave-Stopper active layer deliver reliable clamp load and long-term sealing under towing, tuning, and daily-driver abuse. Designed for 2001–2016 GM Duramax LB7/LLY/LBZ/LMM/LML.
Fitment
- 2001–2016 Chevrolet Silverado/GMC Sierra 2500HD/3500HD — 6.6L Duramax (LB7, LLY, LBZ, LMM, LML)
- Also fits select Express/Savana and medium-duty Duramax applications where RH (passenger-side) Grade C is specified
Cross-Reference / Alternatives (Mahle only)
- Matching Left-Side (Driver) Grade C — MAHLE 54597
- Upper Head Set (LB7) — MAHLE HS54580
- Upper Head Set (LML) — MAHLE HS54580C
- Lower Engine Gasket Set (LB7/LLY/LBZ) — MAHLE CS54580
- Exhaust Manifold → Up-Pipe Gasket — MAHLE F31903
- Turbo Mounting Gasket Set (LML/LGH) — MAHLE GS33937
What’s Included
- (1) Right-Side (Passenger) MLS Wave-Stopper head gasket — Grade C, 1.05 mm
Helpful Notes
- Confirm grade and side per OE service data before install (A/B/C thickness and LH/RH side).
- Always use new torque-to-yield head bolts or upgrade to studs; follow OE torque/angle procedure.
FAQ
Is this the passenger-side gasket?
Yes. MAHLE 54598 is the right-hand (RH), passenger-side head gasket.
What thickness and grade is 54598?
Grade C at 1.05 mm (approx. 0.041"). Bore Ø ~106 mm.
Which engines does it fit?
2001–2016 GM 6.6L Duramax platforms (LB7, LLY, LBZ, LMM, LML). Verify by VIN/RPO.
Is this MLS with Wave-Stopper?
Yes—multi-layer steel with Mahle’s Wave-Stopper active layer for clamp-load stability.
Specifications for Mahle 54598
| Attribute | Value |
|---|---|
| Brand | Mahle |
| Part Number | 54598 (Right, Grade C 1.05 mm) |
| Material | MLS (Multi-Layer Steel) with Wave-Stopper |
| Engine Compatibility | 2001–2016 GM 6.6L Duramax (LB7/LLY/LBZ/LMM/LML) |
| Side / Position | Right (Passenger) |
| Thickness / Grade | 1.05 mm — Grade C |
| Bore Diameter | ≈106 mm (4.17") |
| UPC | 027067723550 |
| GTIN (14) | 00027067723550 |
| Shipping | Calculated at Checkout |
| Prop 65 | See www.P65Warnings.ca.gov. |
