Interstate-McBee M-4955366 Piston Ring Kit (Standard) – 07.5–18 6.7L Cummins

Restore compression and oil control on your 6.7L Cummins (2007.5–2018) with this OEM-style standard-size piston ring kit from Interstate-McBee. Built to stock specifications for dependable sealing and long service life. Sold per piston; order 6 sets for a complete engine.

• OEM-equivalent fit: Direct replacement for Cummins 4955366 ring set.
• Standard size: For stock bore/pistons (no overbore).
• Quality materials: Engineered for reliable compression sealing and oil control.
• Aftermarket value: Interstate-McBee performance and durability at a better price than OEM.

Specifications

Vehicle Fitment

Always verify by engine serial number (ESN). Some late-model calibrations may differ.

• Dodge/Ram 2500 & 3500 – 6.7L Cummins 24-Valve:
  • Model years: 2007.5–2018 (verify ESN for 2016–2018 to confirm ring pack)
• Additional platforms: ISB/QSB 6.7 industrial and medium-duty variants (by ESN/part supersession).

Install Notes

• Measure end gaps and follow ring orientation per Cummins service manual.
• Hone cylinders appropriately when re-ringing; clean bores thoroughly before assembly.
• Use proper break-in procedure and oil; recheck fluids after initial run-in.

Warranty

New Interstate-McBee engine parts typically carry 24-month coverage from date of installation under normal use (valvetrain components may differ). See manufacturer policy for full terms.

Why Buy From CPP Diesel

• ESN-verified fitment support from real diesel techs.
• Fast shipping and hassle-free returns.
• Inventory curated for Cummins B-Series rebuilds.

FAQ