Product Description
Seal your 6.6L Duramax the right way with the MAHLE 54581 Right/Passenger-Side Head Gasket — Grade B (1.00 mm). Built as an OE-grade MLS gasket with a combustion-load limiter, it restores clamp integrity on LB7, LLY, LBZ, LMM, and LML engines for dependable sealing under towing, tuning, and daily duty.
Fitment
- 2001–2016 GM 6.6L Duramax V8 — LB7, LLY, LBZ, LMM, LML (Right/Passenger Side)
- Thickness/Grade: 1.00 mm (Grade B) • Material: Multi-Layer Steel (MLS)
Cross-Reference / Alternatives (Mahle only)
- Right — Grade A (0.95 mm): MAHLE 54580
- Right — Grade C (1.05 mm): MAHLE 54582
- Left — Grade A (0.95 mm): MAHLE 54583
- Left — Grade B (1.00 mm): MAHLE 54584
- Left — Grade C (1.05 mm): MAHLE 54585
What’s Included
- One (1) right/passenger-side MLS head gasket only (Grade B 1.00 mm)
- Head bolts/studs sold separately
FAQ
Is this the right/passenger-side gasket?
Yes — 54581 is the RIGHT (passenger) side head gasket for 2001–2016 Duramax.
What thickness is Grade B?
Grade B is 1.00 mm. Choose thickness based on piston protrusion and any head/block machining.
Is this an MLS gasket?
Yes — it’s a multi-layer steel (MLS) design with a combustion-load limiter for reliable sealing.
Do I need new bolts or studs?
Yes — Duramax uses torque-to-yield fasteners. Replace with new bolts or upgrade to studs during reassembly.
Specifications for Mahle 54581
| Attribute | Value |
|---|---|
| Brand | Mahle |
| Part Number | 54581 (Right, Grade B 1.00 mm) |
| UPC | 027067719850 |
| GTIN | 027067719850 |
| Engine Compatibility | 2001–2016 GM 6.6L Duramax (LB7/LLY/LBZ/LMM/LML) |
| Material / Design | Multi-Layer Steel (MLS) with Combustion-Load Limiter |
| Shipping | Calculated at Checkout |
| Prop 65 | See www.P65Warnings.ca.gov |
