Product Description
Seal the driver side of your Duramax the right way with the MAHLE 54584 Left (Driver) Grade B 1.00mm MLS Head Gasket for 2001–2016 6.6L (LB7/LLY/LBZ/LMM/LML). Engineered to OE standards with multi-layer steel construction for stable clamp load and long service life—even under towing and tune-friendly cylinder pressures.
Fitment
- 2001–2016 GM 6.6L Duramax V8 (LB7, LLY, LBZ, LMM, LML) — Left / Driver side
Cross-Reference / Alternatives (Mahle only)
- Left, Grade A (0.95mm): MAHLE 54583
- Left, Grade C (1.05mm): MAHLE 54585
- Right, Grade A (0.95mm): MAHLE 54580
- Right, Grade B (1.00mm): MAHLE 54581
- Right, Grade C (1.05mm): MAHLE 54582
- Left “Wave-Stopper” Grade C: MAHLE 54597
What’s Included
- (1) Left/Driver-side multi-layer steel head gasket, Grade B 1.00mm
- Head bolts/studs not included (replace TTY bolts or upgrade to studs)
FAQ
Is this the left or right gasket?
Left (driver) side. The right/passenger side uses a different part number.
Which thickness should I choose?
Follow GM service info or measured piston protrusion. Grade B = 1.00mm; use A (0.95mm) or C (1.05mm) if required by measurements.
Is it MLS?
Yes—this is a multi-layer steel (MLS) gasket designed for OE-level sealing and durability.
Do I need new bolts?
Yes. Factory bolts are torque-to-yield (TTY). Replace them or install studs for repeatable clamp load.
Specifications for Mahle 54584
| Attribute | Value |
|---|---|
| Brand | Mahle |
| Part Number | 54584 (Left, Grade B, 1.00mm) |
| UPC | 027067719911 |
| GTIN | 027067719911 |
| Side / Orientation | Left (Driver) |
| Thickness / Grade | 1.00mm — Grade B |
| Material | Multi-Layer Steel (MLS) |
| Typical Bore | ≈105.4mm (≈4.14") |
| Package Dimensions | 6.00" × 6.00" × 6.00" (site listing) |
| Shipping | Calculated at Checkout |
| Prop 65 | Not specified by manufacturer. See www.P65Warnings.ca.gov. |
