MAHLE CB-1990P-.25MM CONNECTING ROD BEARING (.25MM) FOR 01-16 GM DURAMAX

Product Description

Dial in precise oil clearance on your Duramax lower end with the MAHLE CB-1990P-.25MM P-Series connecting rod bearing. Engineered for the 2001–2016 6.6L Duramax (LB7/LLY/LBZ/LMM/LML), this .25 mm undersize “A-rod” shell uses a hardened steel back with TM-77 tri-metal overlay for high crush retention, stable oil film, and durability under towing and work-truck loads.

Mahle CB-1990P-.25MM, Duramax 6.6L rod bearing .25mm, LB7 LLY LBZ LMM LML P-Series bearing, tri-metal TM-77, A-rod shell, CPP Diesel Mahle rod bearings, undersize .010 Duramax bearings, Duramax crank grind 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)
• 2006–2016 Chevrolet Express / GMC Savana 2500–3500 – 6.6L Duramax (LGH/LMM/LML)

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

• MAHLE CB-1990P (STD) – A-shell
• MAHLE CB-1990P-.50MM – A-shell (.50 mm)
• MAHLE CB-1805P (STD) – B-shell
• MAHLE CB-1805P-.25MM – B-shell (.25 mm)

Notes

.25 mm undersize bearings require a properly ground and finished crankshaft journal. Confirm rod stamping (“A” or “B”) and measure journal/bore; set clearances to spec.

FAQ

Will this fit all 2001–2016 Duramax engines?

Yes—LB7, LLY, LBZ, LMM, and LML are covered. Verify you need the .25 mm undersize and that your rods are marked “A”.

Is this sold individually or as a set?

Sold individually (one position). A V8 requires eight rod positions—match A/B shells per rod.

What’s the companion B-shell?

Use the MAHLE CB-1805P in the matching size for rods stamped “B”.

Specifications for Mahle CB-1990P-.25MM