Product Description
MAHLE VS50550 is an OE-quality molded rubber valve cover & lower rocker cover gasket set for the 2004.5–2007 GM 6.6L Duramax LLY/LBZ. It restores a clean, leak-free seal at the upper covers and rocker boxes to help prevent oil seepage, misfires from contamination, and dirt intrusion in hard-working HD trucks.
Fitment
- 2004.5–2005 Chevrolet/GMC 2500HD & 3500HD – 6.6L Duramax LLY (VIN “2”)
- 2006–2007 Chevrolet/GMC 2500HD & 3500HD – 6.6L Duramax LBZ (VIN “D”)
- Also used on select Express/Savana vans & Kodiak/TopKick where equipped with LLY/LBZ; verify by VIN/RPO.
Cross-Reference / OE Numbers
- GM upper valve cover: 97312341 (LLY/LBZ/LMM family)
- GM lower rocker/valve cover: 97321295 (LLY/LBZ/LMM/LML family)
Recommended MAHLE Pairings (Internal Links)
- MAHLE VS50434 Lower Rocker Cover Gasket Set – 04.5–10 Duramax
- MAHLE VS50439 Valve Cover Gasket Set – 04.5–10 Duramax
- MAHLE HS54580A Cylinder Head Gasket Set – 04.5–07 LLY/LBZ
- MAHLE 95-3727 Engine Gasket Set (No Head Gasket) – 04.5–07 LLY/LBZ
Why MAHLE
- Molded one-piece sealing rails resist shrinkage and torque loss
- OE-style rubber formulation for heat-cycle durability
- Direct-fit geometry reduces install time and rework
Installation Notes
- Clean all mating surfaces; replace grommets/bolts as needed
- Torque fasteners per GM service manual; avoid excess sealant
- One kit services one engine
FAQ
Will VS50550 fit both LLY and LBZ?
Yes—this kit covers 2004.5–2005 LLY and 2006–2007 LBZ applications. Confirm by VIN/RPO before ordering.
Does this include injector seals or RTV?
Contents may vary by batch. Inspect the tray on arrival; add any missing seals/RTV as needed.
How many kits are required?
Just one VS50550 kit services one engine.
What’s the UPC/GTIN?
UPC (GTIN-12): 027067845634.
Specifications for Mahle VS50550
| Attribute | Value |
|---|---|
| Brand | MAHLE |
| Part Number | VS50550 |
| UPC / GTIN | 027067845634 |
| Shipping Info | Ships from CPP Diesel; Free Shipping shown on product page. Typical lightweight gasket kit packaging. |
| 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. |
