Product Description
MAHLE / CLEVITE CB-1873H-.25MM is an H-Series high-performance connecting rod bearing for 2003–2018 Cummins 5.9L & 6.7L engines that use cracked/fractured-cap rods. This size is 0.25 mm undersize (.010") for reground crank journals.
- Series: H-Series performance (tri-metal)
- Size: .25 mm undersize
- Construction: Hardened steel back, thin overlay, medium eccentricity, high crush, enlarged chamfers; no flash plating for better seating
- Sold: Individually (order the quantity you need; 12 halves = 6 pairs per engine)
- Intended Use: Ideal where higher loads/RPM or oversized crank fillets require H-Series bearings
Fitment
- 2003–2007 Ram 2500/3500 5.9L Cummins (24-valve)
- 2007.5–2018 Ram 2500/3500 6.7L Cummins
- 2008–2018 Ram 4500/5500 6.7L Cummins
Notes: XDP lists coverage through 2017; multiple distributors list through 2018. Verify by engine VIN/ESN when in doubt.
Cross Reference & IDs
- Manufacturer: MAHLE / Clevite
- MPN formats: CB1873H25MM, CB-1873H-.25MM
- GTIN/UPC: 027067865267
- Related sizes: CB-1873H (STD), CB-1873HX (.001" extra clearance)
What’s Included
One rod bearing shell (order two per rod).
Install Tips
- Confirm journal undersize (.25 mm/.010"). Plastigage or mic for final clearance.
- Use assembly lube and follow Cummins torque/angle specs.
- Match bearing tangs and oiling notches to rod/cap orientation.
FAQ
Will this fit my truck?
Fits Cummins 5.9L (2003–2007) and 6.7L (2007.5–2018) engines with fractured-cap rods used in Ram 2500/3500/4500/5500.
Is this a pair or a single?
Sold individually as listed by major retailers; you need 12 halves (6 pairs) per engine.
When should I choose H-Series?
Use H-Series for performance builds, higher cylinder pressures, or crankshafts with oversized fillets where extra chamfer clearance and tri-metal construction help durability.
What’s the difference between H and HX?
HX provides about +.001" additional oil clearance vs. standard H-Series for specific clearance targets.
