MAHLE CB-1805P-.25MM(8) P-SERIES ROD BEARINGS SET (.25MM) FOR 01–16 GM DURAMAX

Product Description

MAHLE CB-1805P-.25MM(8) is a complete engine set of eight .25 mm undersize P-Series rod bearing pairs for the 2001–2016 GM 6.6L Duramax (LB7, LLY, LBZ, LMM, LML). Built on a hardened steel back with MAHLE/Clevite TM-77 tri-metal overlay, these “B-rod” bearings deliver high crush for retention, stable oil film under load, and durability against overlay fatigue in towing, performance, and high-RPM use.

Mahle CB-1805P-.25MM(8) Duramax rod bearings set, 6.6L Duramax B-rod bearings undersize, LB7 LLY LBZ LMM LML rod bearing kit, P-Series tri-metal TM-77, crank ground .010 under bearings, CPP Diesel Mahle bearings

Fitment

• 2001–2016 Chevrolet/GMC 6.6L Duramax: LB7, LLY, LBZ, LMM, LML
• Typical platforms: Silverado/Sierra 2500HD–3500HD, Express/Savana 2500/3500/4500, Kodiak/TopKick C4500/C5500
• Use with connecting rods stamped “B”; verify crankshaft journal undersize and oil clearance during assembly

Cross-Reference / Alternatives (Mahle only)

• Pair (single-rod) version — same size: MAHLE CB-1805P-.25MM (pair)
• Complete engine set — standard size: MAHLE CB-1805P(8) STD
• “B-rod” — .50 mm undersize (pair): MAHLE CB-1805P-.50MM
• Alternate “A-rod” family — .25 mm undersize (pair): MAHLE CB-1990P-.25MM
• Alternate “A-rod” family — standard size (pair): MAHLE CB-1990P STD

What’s Included

• Eight bearing pairs (16 shells total) — complete V8 engine set
• P-Series tri-metal bearings with hardened steel back and thin overlay

FAQ

Is this a full set?
Yes. “(8)” means eight bearing pairs (16 shells) — one pair per connecting rod.

When do I use .25 mm undersize?
When the crank rod journals have been ground to 0.25 mm (.010") under standard. Always measure and verify oil clearance.

Do these fit all 2001–2016 Duramax engines?
They cover LB7, LLY, LBZ, LMM, and LML applications that use “B”-stamped rods. If your rods are stamped “A,” use the CB-1990P family.

Are these tri-metal?
Yes — TM-77 tri-metal overlay with a hardened steel back, medium eccentricity, and high crush for retention.

Specifications for Mahle CB-1805P-.25MM(8)