Product Description
MAHLE MS-2218H-.026MM is a Clevite H-Series .026 mm undersize main bearing set for the 2001–2016 GM 6.6L Duramax (LB7, LLY, LBZ, LMM, LML). Built on a hardened steel back with a thin overlay and made without flash plating, these bearings deliver high crush and reliable seating for high-load, medium-to-high RPM builds. Requires thrust washer set TW-610S (sold separately).
- Series: Clevite H-Series (performance)
- Size: .026 mm undersize
- Construction: Hardened steel back, thin overlay; no flash plating for better seating
- Intended use: Engines with oversize crankshaft fillets; medium-to-high RPM operation
Fitment
- 2001–2016 GM 6.6L Duramax V8 (LB7 2001–2004, LLY 2004.5–2005, LBZ 2006–2007, LMM 2007.5–2010, LML 2011–2016)
Cross Reference & IDs
- MPN: MS2218H026MM (also shown as MS-2218H-.026MM)
- Alt ID (retail): MS2218H026
- UPC/GTIN: 27067704573 / 00027067704573
- Use with thrust washer set: TW-610S
What’s Included
(1) Complete main bearing set for one engine.
FAQ
Will these fit my Duramax?
Yes—fits 6.6L Duramax LB7/LLY/LBZ/LMM/LML (model years 2001–2016).
Do I need thrust washers?
Yes—pair with TW-610S thrust washer set (sold separately) for a complete install.
Any machining notes for .026 mm undersize?
Undersize bearings can be used, but the crankshaft must be re-hardened with a nitride heat treatment during machining.
Groove configuration?
Typical H-Series main sets use a grooved upper and a plain lower shell for oil control in performance builds.
Helpful Links
- Thrust Washers TW-610S (Recommended)
