INTERSTATE-MCBEE M-4955366 PISTON RING KIT STD 07.5–18 6.7L CUMMINS (AFTERMARKET REPLACEMENT)

Product Description

Interstate-McBee M-4955366 Piston Ring Kit, STD – 2007.5–2018 6.7L Cummins ISB

Premium replacement piston ring kit for the 6.7L Cummins ISB used in 2007.5–2018 Ram trucks and other B-Series applications. Built to OE form, fit, and function for reliable sealing, proper oil control, and long service life. Standard bore (STD).

• OE-equivalent sealing: Restores compression and oil control on stock engines.
• Direct fit: Designed for factory 6.7L Cummins ISB standard bore cylinders.
• Service-ready: Pairs well with fresh hone, new bearings, and gasket set.
• Trusted quality: Interstate-McBee aftermarket replacement components.

*If you require a single-cylinder ring set or an oversize, contact us before ordering.

What’s Included

• (1) Complete piston ring set, standard bore, for one 6-cylinder 6.7L Cummins

Vehicle Fitment

Always verify by engine serial number (ESN) when possible.

• Ram 2500/3500 – 6.7L Cummins ISB (2007.5–2018)
• Ram 3500/4500/5500 Cab & Chassis – 6.7L Cummins ISB (select 2008–2018)
• Other B-Series/industrial applications where Cummins/Interstate-McBee 4955366 is specified (confirm by ESN and bore)

Install Notes

• Measure cylinder bore and taper; this kit is STD only. Use the correct oversize ring set if the block has been bored.
• File-fit only if required to achieve proper end gap. Check every ring in every cylinder.
• Confirm ring orientation and placement (top/second/oil) per the service manual.
• Light plateau hone is recommended for proper seating; clean bores meticulously.
• Use proper break-in oil and follow manufacturer procedures.

Recommended/Related Parts

• Full engine gasket set (6.7L Cummins)
• Main and rod bearings (standard or oversize as required)
• Piston set (STD or oversize to match machine work)
• Head bolts or studs (replace torque-to-yield fasteners)
• Oil pump and timing components (inspect/replace as needed)

Why Buy From CPP Diesel

• ESN-verified fitment support from diesel specialists
• Fast shipping and hassle-free returns
• Deep inventory for 6.7L Cummins rebuilds and maintenance

FAQ

Is this the right kit for my 2007.5–2018 Ram 6.7L?

Yes, this ring kit is for standard-bore 6.7L Cummins ISB engines in 2007.5–2018 Ram trucks. For edge cases or mixed-year builds, verify by ESN.

What does STD mean?

STD = standard bore. If your block has been bored/honed beyond factory, you’ll need the correct oversize ring set.

Does this kit cover all six cylinders?

Yes—this listing is an engine set for one 6-cylinder engine. If you need a single-cylinder set, contact us.

Can I reuse my old rings?

Not recommended. Rings wear to the original cylinder and won’t reseat properly after a rebuild.