Product Description
MAHLE/CLEVITE CB-1805H-.25MM H-Series connecting rod bearing for the 2001–2016 GM 6.6L Duramax. This is a 0.25 mm undersize bearing (approx. 0.010") for use with a reground crank journal. H-Series bearings feature medium eccentricity, high crush, a hardened steel back with thin overlay, and enlarged chamfers for crank fillet clearance. Sold individually (per rod) — order 8 for a complete engine set.
- Material: TM-77 tri-metal
- Size: .25 mm undersize (regrind required)
- Use in medium-to-high RPM and performance builds
Note: Undersize bearings require crankshaft grinding to the matching undersize and are commonly paired with post-grind nitride heat treatment. Follow OEM/Mahle Clevite specs for oil clearance and surface finish.
Fitment
- 2001–2016 GM/Chevy/GMC 6.6L Duramax: LB7, LLY, LBZ, LMM, LML
Cross Reference & IDs
- MPN: CB1805H25MM
- GTIN/UPC: 027067704535
- Related MAHLE/Clevite sizes: CB-1805H (STD), CB-1805HX (STD +.001" extra oil clearance)
What’s Included
- (1) H-Series connecting rod bearing shell (.25 mm undersize)
FAQ
Will this fit my Duramax?
Yes. It fits 2001–2016 6.6L Duramax platforms LB7/LLY/LBZ/LMM/LML.
How many do I need?
Eight bearings are needed for a complete V8 engine (one per connecting rod).
Do I need machine work?
Yes. This .25 mm undersize bearing requires the crank journal to be ground to the matching undersize; many builders re-nitride after grinding.
Is it sold as a pair or each?
Sold individually (per rod). Order quantity accordingly.
