MAHLE CB-1805HK-.25MM H-SERIES ROD BEARING (.25MM) FOR 01-16 GM DURAMAX

Product Description

Dial in precise oil clearance and durability on your Duramax build with the MAHLE CB-1805HK-.25MM H-Series rod bearing. This .25 mm undersize shell (≈.010") is engineered for reground journals and high-load use across LB7, LLY, LBZ, LMM, and LML platforms—featuring a hardened steel back, TM-77 tri-metal overlay, medium eccentricity, high crush, and enlarged chamfers for crank fillet clearance.

Mahle CB-1805HK-.25MM, H-Series Duramax rod bearing .25 mm undersize, 6.6L GM LB7 LLY LBZ LMM LML bearings, tri-metal TM-77, hardened steel back, enlarged chamfer, CPP Diesel Mahle bearings

Fitment

• 2001–2016 Chevrolet Silverado 2500HD/3500HD – 6.6L Duramax (LB7, LLY, LBZ, LMM, LML)
• 2001–2016 GMC Sierra 2500HD/3500HD – 6.6L Duramax (LB7, LLY, LBZ, LMM, LML)
• Select 6.6L Duramax van/chassis applications (Express/Savana, Kodiak/TopKick)

Cross-Reference / Alternatives (Mahle on CPP Diesel only)

• MAHLE CB-1805H-.25MM (H-Series, .25 mm undersize)
• MAHLE CB-1805HX (H-Series, STD + .001" oil clearance)
• MAHLE CB-1805P-.25MM (P-Series, .25 mm undersize)
• MAHLE CB-1990P-.25MM (A-rod family, .25 mm undersize)

Helpful Notes

“B”-stamped connecting rods use the CB-1805 family; “A”-stamped rods use CB-1990. .25 mm undersize bearings require matching journal grind; always measure oil clearance and verify tang position.

FAQ

Does this fit all 2001–2016 Duramax engines?

Yes—LB7, LLY, LBZ, LMM, and LML when a .25 mm undersize H-Series shell is required.

How many do I need?

Eight shells are required to service all V8 connecting rods (sold individually unless noted).

Why choose H-Series vs. P-Series?

H-Series emphasizes high-load performance with a hardened steel back, thin overlay, high crush, and enlarged chamfers. P-Series is tuned for OE-style durability.

Specifications for Mahle CB-1805HK-.25MM