Product Description
Dial in proper oil clearance on your 6.6L with the MAHLE MS-2218P-.25MM P-Series Main Bearing Set for 2001–2016 GM Duramax (LB7/LLY/LBZ/LMM/LML). Built on Clevite-by-Mahle TM-77 tri-metal construction with a full-groove upper shell to stabilize the oil film under heavy load, this .25 mm (.010") undersize set is the right choice after a .010" crank grind. Thrust washers are sold separately.
Fitment
- 2001–2016 GM 6.6L Duramax: LB7, LLY, LBZ, LMM, LML (Silverado/Sierra 2500HD & 3500/3500HD; select Express/Savana vans; Kodiak/TopKick C4500/C5500 where equipped)
Cross-Reference / Alternatives (Mahle only)
- Mahle MS-2218P (STD): MS-2218P
- Mahle MS-2218P-.50MM (.50 mm undersize): MS-2218P-.50MM
- Mahle MS-2218H-.25MM (H-Series .25 mm): MS-2218H-.25MM
- Mahle MS-2218HX (H-Series STD + .001"): MS-2218HX
- Mahle TW-610S Thrust Washer Set: TW-610S
What’s Included
- Complete .25 mm undersize main bearing shell set (upper & lower) for one 6.6L Duramax engine
- Note: Thrust washers not included (use Mahle/Clevite TW-610S)
FAQ
Will these fit my LB7/LLY/LBZ/LMM/LML?
Yes—coverage is 2001–2016 6.6L Duramax as listed in Fitment.
What does .25 mm mean?
It’s .010" undersize intended for a crankshaft ground .010" under.
Do I need to re-harden (nitride) the crank?
Mahle/Clevite recommends re-hardening after grinding for durability.
Are thrust washers included?
No—order TW-610S separately.
Specifications for Mahle MS-2218P-.25MM
| Attribute | Value |
|---|---|
| Brand | Mahle / Clevite |
| Part Number | MS-2218P-.25MM |
| UPC | 027067379788 |
| GTIN | 00027067379788 |
| Series / Material | P-Series, TM-77 Tri-Metal |
| Size | .25 mm undersize (.010") |
| Engine Compatibility | 2001–2016 6.6L Duramax (LB7/LLY/LBZ/LMM/LML) |
| Package Dimensions (WxHxD) | 3.90" × 6.00" × 4.70" |
| Shipping | Calculated at Checkout |
| Prop 65 | Not specified by manufacturer. See www.P65Warnings.ca.gov. |
