Product Description
MAHLE F31909 is the OE-quality EGR tube to EGR valve gasket for the 2004.5–2007 GM 6.6L Duramax (LLY/LBZ). Built to factory specs for a precise seal and long service life.
- Application: 6.6L Duramax (LLY 2004.5–2005, LBZ 2006–2007)
- Direct-fit replacement; sold individually
- Material and dimensions meet or exceed OE requirements
- UPC/GTIN: 027067721303
Fitment
- 2004.5–2005 Chevrolet/GMC 6.6L Duramax LLY (2500HD/3500HD)
- 2006–2007 Chevrolet/GMC 6.6L Duramax LBZ (2500HD/3500HD)
Cross Reference Numbers
- GM: 97303655
- MAHLE/Original: F31909
- UPC/GTIN: 027067721303
What’s Included
(1) EGR tube-to-EGR valve gasket.
Install Notes
- Clean mating surfaces and verify tube alignment before tightening.
- Torque fasteners to factory spec; re-check after heat cycles.
FAQ
Will this fit my 2004.5–2007 Duramax?
Yes—fits LLY (2004.5–2005) and LBZ (2006–2007) 6.6L engines.
Is this a direct OEM replacement?
Yes—dimensions and materials meet OE spec; replaces GM 97303655.
Do I need any sealant?
No—install dry unless the factory manual specifies otherwise; keep surfaces clean and flat.
What other gaskets should I consider while I’m in there?
If you’re servicing more of the EGR system, pair with related Duramax gaskets like MAHLE F31912 EGR Valve Gasket and cooling/upper-engine seals from our Duramax gaskets category.
