Industrial Injection PDM-MS-2328HXC HX Series Coated Race Main Bearings Std +.001

The Industrial Injection PDM-MS-2328HXC is an HX Series coated race main bearing set designed for the 1989–2018 Cummins 5.9L and 6.7L diesel engine. Built on proven Clevite race geometry, these bearings deliver the extra oil clearance and protective coating demanded by high-performance competition and heavy-duty street builds.

HX Series Race Design:

• +.001" extra clearance over standard, providing improved oil film thickness for high-RPM and high-load applications
• Medium eccentricity with high crush for optimal bearing stability and seating
• Hardened steel back with thin overlay on rod bearings for superior strength under extreme loads
• Enlarged chamfers for greater crankshaft fillet clearance, reducing stress concentration at journal edges
• Manufactured without flash plating for enhanced break-in seating and surface conformability

Performance Dry Film Coating Benefits:

• Protects bearing surfaces during cold starts when oil has drained back to the pan and pressure is not yet established
• Acts as a barrier between the bearing surface and crank journal during oil starvation events
• Moly-based coating formulation retains oil rather than repelling it, maintaining a consistent lubricating film
• Reduces friction for extended bearing and crankshaft journal life
• Coating technology developed for race engines and proven effective in street and daily-use applications

Key Specifications:

• Size: Standard +.001" (HXC clearance)
• Application: 1989–2018 Cummins 5.9L / 6.7L B-Series diesel engines
• Cross-reference: MS-2328HX (MAHLE/Clevite base bearing)
• Includes upper flanged thrust bearing and full main shell set

The PDM-MS-2328HXC is engineered for builders who need additional oil clearance for high-power, high-RPM, or thermally demanding diesel builds. The combination of race-proven HX geometry and dry film coating makes this bearing set an excellent choice for competition engines as well as aggressive street and strip applications.