Product Description
MAHLE CB-1990P is a P-Series, tri-metal standard size connecting rod bearing for the 2001–2016 GM 6.6L Duramax (LB7/LLY/LBZ/LMM/LML). Built with a hardened steel back and TM-77 overlay, it’s engineered for durability, secure crush, and consistent oil film under heavy load and RPM. Sold individually (order 8 for a V8).
- Series: P-Series performance (tri-metal)
- Size: Standard (STD)
- Key features: High crush retention, high eccentricity for oil distribution, hardened steel back
- Use with connecting rods stamped “A”.
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)
- 2001–2016 Chevrolet Express 2500/3500 6.6L Duramax
- 2001–2016 GMC Savana 2500/3500 6.6L Duramax
Specifications
- MPN: CB1990P / CB-1990P
- GTIN/UPC: 027067970978
- Housing bore (min–max): 2.637 in – 2.638 in
- Shaft diameter (min–max): 2.476 in – 2.477 in
- Vertical oil clearance (min–max): 0.001 in – 0.003 in
- Note: Use with rods marked “A”; sold individually.
Cross Reference / Interchange
- Clevite / MAHLE: CB-1990P (STD)
- Package level GTIN: 00027067970978
FAQ
Is this the correct bearing size?
Yes—this listing is for standard (STD) size. Measure journals/bores and follow factory specs to confirm.
Will these fit all 2001–2016 Duramax engines?
Yes—LB7, LLY, LBZ, LMM, and LML applications are covered. Use with connecting rods stamped “A”.
How many do I need?
These are sold individually. A V8 requires 8 rod bearings.
Are these tri-metal P-Series?
Yes—P-Series with hardened steel back and TM-77 overlay for durability.
