Product Description
MAHLE CB-1805P-.50MM is a P-Series B-shell connecting rod bearing for the 2001–2016 GM 6.6L Duramax (LB7, LLY, LBZ, LMM, LML). This .50 mm undersize bearing is built on MAHLE/Clevite’s tri-metal TM-77 construction with a hardened steel back, high crush for retention, and reduced overlay thickness for durability in high-RPM/ high-load builds. Use with connecting rods marked “B.” Sold individually (pair per part), typically used with the matching A-shell on each rod.
- Series: P-Series (TM-77 tri-metal)
- Size: .50 mm undersize
- Design traits: high crush, medium/elevated eccentricity, thin overlay, hardened steel back
- Sold: individually; check engine quantity requirements
Fitment
- 2001–2016 Chevrolet/GMC 6.6L Duramax diesel (LB7, LLY, LBZ, LMM, LML) including Silverado/Sierra 2500HD/3500HD; select Express/Savana vans (2006–2016); medium duty Kodiak/TopKick (2003–2007). Not for L5P (2017+).
Cross-Reference & Related
- B-shell: MAHLE/Clevite CB-1805P (Std), CB-1805P-.25MM, CB-1805P-.50MM (this item)
- A-shell (mate on the same rod): MAHLE/Clevite CB-1990P (Std), CB-1990P-.25MM, CB-1990P-.50MM
- Notes: “Use with connecting rod marked ‘B’.” One A-shell + one B-shell per connecting rod.
What’s Included
One (1) B-shell rod bearing pair. Bearings are typically installed as A+B shells per rod; verify total quantity before ordering.
FAQ
Will this fit my Duramax?
Yes—fits 6.6L Duramax LB7/LLY/LBZ/LMM/LML (2001–2016). Not compatible with L5P (2017+).
Is this the correct shell?
This is the B-shell bearing. Duramax rods are lettered; use B-shell bearings on rods marked “B.” Pair with the matching A-shell on each rod.
Do I need machine work for .50 mm undersize?
Yes—.50 mm undersize bearings require crankpin machining to the corresponding undersize; verify oil clearance during assembly.
What’s special about P-Series?
P-Series bearings use TM-77 tri-metal with a hardened steel back, high crush, and reduced overlay to resist fatigue under high load and RPM.
