Product Description
MAHLE / Clevite MS-2218HX H-Series main bearing set for the 2001–2016 6.6L Duramax (LB7/LLY/LBZ/LMM/LML). The HX variant provides .001" extra oil clearance in a standard-size tri-metal bearing—ideal for performance builds, increased oil film under load, and cranks with large fillets. Thrust washer set is required and sold separately (TW-610S).
- Series: H-Series tri-metal (TM-77 overlay)
- Size: Standard with .001" extra clearance (HX)
- Construction: Hardened steel back, high crush, enlarged chamfers, no flash plating for better seating
- Use case: Medium-to-high RPM and performance applications
- Set quantity: Complete main bearing set for one engine
Fitment
- 2001–2016 GM 6.6L Duramax: LB7, LLY, LBZ, LMM, LML (including Silverado/Sierra 2500HD/3500HD; Express/Savana 2500/3500/4500; Kodiak/TopKick C4500/C5500 where equipped)
Cross Reference & Related
- Manufacturer P/N: MS2218HX (a.k.a. MS-2218HX)
- UPC/GTIN: 027067704566
- Required thrust: TW-610S (thrust washer set)
- Alternate variant: MS-2218H (standard clearance, non-HX)
- Companion rods (optional): CB-1805HX H-Series rod bearings (.001" extra clearance)
What’s Included
Complete H-Series main bearing set (standard journal with .001" extra oil clearance). Thrust washers not included.
FAQ
Will these fit my 2001–2016 6.6L Duramax?
Yes—this set covers LB7, LLY, LBZ, LMM, and LML engines from 2001 through 2016.
What does HX mean?
HX indicates a standard-size bearing with approximately .001" additional oil clearance to help maintain oil film at higher power/RPM.
Do I need a thrust washer set?
Yes—order thrust set TW-610S separately.
Is this OK for street trucks?
Yes. H-Series were developed for racing but are commonly used in street/strip and towing builds when clearances and surface finishes are correct.
