Product Description
MAHLE / CLEVITE MS-2328P-.75MM P-Series main bearing set for 1989–2018 Cummins 5.9L / 6.7L ISB. Tri-metal TM-77 construction with full-groove mains maximizes oil delivery, while high crush and reduced overlay thickness help prevent overlay fatigue under load. Ideal for stock rebuilds and performance street/working trucks that require 0.75 mm undersize bearings after crankshaft regrind.
- Series: P-Series (tri-metal)
- Material: TM-77
- Size: .75 mm undersize (for reground crank journals)
- Design: full-groove mains, high crush, reduced overlay thickness
- GTIN/UPC: 027067912299 • MPN: MS2328P75MM
Fitment
- 1989–1998 Dodge Ram 2500/3500, 5.9L Cummins 12-valve
- 1998.5–2002 Dodge Ram 2500/3500, 5.9L Cummins 24-valve
- 2003–2007 Dodge Ram 2500/3500, 5.9L Cummins common-rail
- 2007.5–2018 Ram 2500/3500, 6.7L Cummins ISB
Note: Always verify journal size, thrust width, and block/crank casting before ordering; certain late-model applications may vary by build date.
Cross Reference / Related Sizes
- MAHLE/Clevite: MS-2328P (STD), MS-2328P-.25MM, MS-2328P-.50MM, MS-2328P-.75MM, MS-2328P-1.00MM
- Common companion part: MAHLE CB-1873A* rod bearings (match size to crank regrind)
FAQ
Will these fit my truck?
If you have a 1989–2018 Ram with a 5.9L or 6.7L Cummins and your crank is ground to .75 mm undersize, these are the correct main bearings. Always mic the crank to confirm.
What’s special about P-Series?
P-Series tri-metal bearings feature full-groove mains, high crush for retention, and a reduced overlay to resist fatigue—ideal for higher load and performance use.
Do I need thrust bearings?
The thrust bearing(s) are included within the set. Inspect endplay and replace if out of spec during assembly.
Do these increase oil pressure?
They don’t raise pressure by themselves; correct clearances and full-groove design help maintain oil film stability for durability.
