Product Description
Race-ready bottom-end stability for your 5.9L/6.7L Cummins. INDUSTRIAL INJECTION’s H-Series coated main bearings (PDM-MS-2328HC) use proven MAHLE/Clevite race geometry with a performance coating for improved scuff resistance and oil control in high load, high RPM builds.
Fitment
- 1989–1998 5.9L 12-Valve Cummins (D/W & Ram)
- 1998.5–2002 5.9L 24-Valve Cummins
- 2003–2007 5.9L Common-Rail Cummins
- 2007.5–2018 6.7L Common-Rail Cummins
What’s Included
- Complete H-Series coated main bearing set (upper & lower shells)
- Upper flanged thrust bearing
Why H-Series (Race)
- Tri-metal construction with hardened steel back for high load capacity
- Medium eccentricity & high crush for stable seating at high cylinder pressure
- Enlarged chamfers for crank fillet clearance
- No flash plating for precise housing fit in performance/line-honed blocks
- Low-friction coating to help during cold starts and momentary oil-film events
Recommended Parts (CPP Internal Links)
- ARP 247-5402 Main Stud Kit (1989–1997 12V)
- ARP 247-5403 Main Stud Kit (2003–2018 w/ stiffener)
- ARP 247-5401 Main Stud Kit (’97.5–Present, w/o stiffener)
- MAHLE/Clevite MS-2328H (STD) – Reference OE H-Series geometry
- Shop Cummins Studs & Bolts Category
Helpful Notes
- Measure crank and housing bores; line-hone blocks as required. Verify oil clearance and thrust endplay.
- Pair bearing clearance with intended oil viscosity, rpm, and use. HX (extra-clearance) sets are available if needed.
FAQ
Do these include the thrust bearing?Yes—this complete set includes the upper flanged thrust bearing along with the main shells.
When should I choose HX (extra-clearance) instead?Very high rpm, large oil temperature, or polished/ground crank journals may benefit from HX. See our HX listing if you require additional clearance.
Are these suitable for street trucks?They’re engineered for competition, but work great in high-power street/strip builds when clearances and oiling are set correctly.
What fasteners should I run?Main studs are strongly recommended for power/boost beyond stock. See ARP kits linked above for the correct year/application.
