Product Description
Dial in proper oil clearance on a reground Duramax crank with the MAHLE CB-1805H-.25MM H-Series Rod Bearing. Engineered on TM-77 tri-metal with a hardened steel back, medium eccentricity, high crush, and enlarged chamfers, this .25 mm undersize shell (≈0.010") is built for sustained load, heat, and RPM in 2001–2016 6.6L GM platforms.
Fitment
- 2001–2016 GM 6.6L Duramax: LB7, LLY, LBZ, LMM, LML
Cross-Reference / Alternatives (Mahle only)
- Mahle CB-1805H (H-Series, Standard): CB-1805H
- Mahle CB-1805HX (H-Series, STD + .001" extra clearance): CB-1805HX
- Mahle CB-1805HK-.25MM (H-Series, heavy-duty .25 mm undersize shell): CB-1805HK-.25MM
- Mahle CB-1805P-.25MM (P-Series, .25 mm undersize): CB-1805P-.25MM
What’s Included
- (1) H-Series connecting rod bearing shell — .25 mm undersize (sold individually; order 8 per engine)
FAQ
Will this fit my Duramax?
Yes—fits 2001–2016 6.6L LB7/LLY/LBZ/LMM/LML with rods/crank in good condition.
How many do I need for a full engine?
Eight shells (one per connecting rod). Always verify quantity per your build list.
Do I need machine work?
Yes. .25 mm undersize bearings require grinding the crank journals to the matching undersize; many builders re-nitride after grinding.
Why choose H-Series?
H-Series is the performance line—TM-77 tri-metal, high crush, and enlarged chamfers for fillet clearance and stability under load.
Specifications for Mahle CB-1805H-.25MM
| Attribute | Value |
|---|---|
| Brand | Mahle / Clevite (H-Series) |
| Part Number | CB-1805H-.25MM |
| UPC | 027067704535 |
| GTIN | 027067704535 |
| Engine Compatibility | 2001–2016 GM 6.6L Duramax (LB7, LLY, LBZ, LMM, LML) |
| Size | .25 mm undersize (≈0.010") |
| Material / Features | TM-77 tri-metal; hardened steel back; high crush; medium eccentricity; enlarged chamfers; no flash plating |
| Package Dimensions | Approx. 6.0" × 6.0" × 6.0" (site listing) |
| Shipping | Calculated at Checkout |
| Prop 65 | Not specified by manufacturer. See www.P65Warnings.ca.gov. |
