MAHLE CB1990P25MM CONNECTING ROD BEARING; .25MM FOR 01-16 GM DURAMAX

Product Description

Dial in precise oil clearance on your Duramax bottom end with the MAHLE CB1990P .25MM P-Series connecting rod bearing (“A”-rod shell). Engineered for 2001–2016 6.6L Duramax (LB7/LLY/LBZ/LMM/LML), this 0.25 mm undersize shell uses a hardened steel back with TM-77 tri-metal overlay for high crush retention, stable oil film, and durability under towing, tuning, and work-truck heat cycles.

Mahle CB1990P25MM connecting rod bearing, CB-1990P-.25MM Duramax A-rod shell, 6.6L LB7 LLY LBZ LMM LML .25 mm undersize rod bearing, TM-77 tri-metal P-Series, CPP Diesel Mahle bearings, Duramax rebuild parts, .010 under crank grind bearings, secure crush oil film stability

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 (as equipped)

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-.25MM – B-shell (.25 mm)

Notes

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

FAQ

Will this fit all 2001–2016 Duramax engines?

Yes—LB7, LLY, LBZ, LMM, and LML platforms that use the “A” connecting rod shell. Verify your rod marking and undersize requirement before ordering.

Is this sold individually or as a set?

Sold individually (one bearing position). A V8 uses eight rod bearing positions; match A/B shells per rod.

What material/series is this?

P-Series with a TM-77 tri-metal overlay on a hardened steel back for high crush and stable oil film.

Specifications for Mahle CB1990P25MM