Product Description
MAHLE VS50439 is an OE-style valve cover gasket set for the 2004.5–2010 GM 6.6L Duramax (LLY/LBZ/LMM). It’s a direct-fit replacement engineered to restore a reliable seal and stop oil seepage from the valve cover perimeter.
- Application: 6.6L Duramax LLY (2004.5–2005), LBZ (2006–2007 Classic), LMM (2007.5–2010)
- Design: OE-style direct replacement
- Kit Qty: 1 kit required per engine
- MPN: VS50439 • GTIN/UPC: 027067722423
- Warranty: 1-Year Limited
Fitment
- 2004.5–2005 Chevrolet Silverado/GMC Sierra 2500HD/3500 with 6.6L Duramax LLY
- 2006–2007 (incl. 2007 Classic) Chevrolet Silverado/GMC Sierra 2500HD/3500 with 6.6L Duramax LBZ
- 2007.5–2010 Chevrolet Silverado/GMC Sierra 2500HD/3500 with 6.6L Duramax LMM
Cross Reference Numbers
- Fel-Pro: VS50439R (equivalent application)
- GM OE (related): 97321295 (lower valve cover gasket used on 2004.5+ Duramax—verify per VIN)
What’s Included
Complete valve cover gasket set for both cylinder heads (perimeter seals; verify contents against your truck’s VIN and build date). Hardware not included.
Install Notes
- Clean mating surfaces thoroughly; inspect covers for warpage.
- Follow factory torque specs and sequence for valve cover bolts.
- Check crankcase ventilation system for proper function while you’re in there.
FAQ
Will this fit my Duramax?
Yes—this set fits LLY, LBZ, and LMM 6.6L engines from mid-2004 through 2010.
How many kits do I need?
Just one kit per engine.
Does it include bolt grommets or hardware?
No hardware is included; reuse or replace as needed per OEM guidance.
Is it an OE-style gasket?
Yes—this is an OE-style, direct-fit replacement designed to meet factory performance.
