Product Description
MAHLE MS-2218P-.25MM P-Series main bearing set for the 2001–2016 GM 6.6L Duramax (LB7/LLY/LBZ/LMM/LML). Built from TM-77 tri-metal for durability and oil film stability. This is a .25 mm (.010") undersize set designed for reground crankshafts; full-groove uppers improve oiling under load. Thrust washers are sold separately.
- Material: TM-77 tri-metal
- Size: .25 mm undersize (.010")
- Configuration: Sold as a set of 5 main bearings
- Requires thrust washer set: TW-610S (not included)
- Note: Clevite guidance—crankshaft should be re-hardened (nitride) after grinding
Fitment
- 2001–2016 GM 6.6L Duramax: LB7, LLY, LBZ, LMM, LML
- Chevrolet Silverado 2500 HD (2001–2016)
- Chevrolet Silverado 3500 / 3500 HD (2001–2016)
- Chevrolet Silverado 2500 HD Classic, 3500 Classic (2007)
- Chevrolet Express 2500/3500/4500 (2006–2016 / 2010–2016)
- Chevrolet C4500/C5500 Kodiak (2003–2007)
- GMC Sierra 2500 HD / 3500 / 3500 HD (2001–2016)
- GMC Savana 2500/3500/4500 (2006–2016 / 2010–2016)
- GMC TopKick C4500/C5500 (2003–2007)
Cross Reference / Related
- MPN: MS2218P25MM
- UPC/GTIN: 00027067379788
- Standard size variant: MAHLE/Clevite MS-2218P (STD)
- .50 mm undersize variant: MAHLE/Clevite MS-2218P-.50MM
- Thrust washer set: Clevite TW-610S (required; not included)
FAQ
Will these fit my LB7/LLY/LBZ/LMM/LML?
Yes—this set fits all 2001–2016 6.6L Duramax platforms listed above.
What does .25 mm mean?
It’s .010" undersize, intended for use after the crankshaft is ground .010" under.
Do I need thrust washers?
Yes, the main set does not include thrusts—use Clevite TW-610S.
Do I have to nitride the crank?
Clevite recommends re-hardening (nitride) after grinding for durability.
What’s included?
Five main bearings (upper/lower shells) for one engine; thrust washers not included.
