Interstate-McBee M-3804990 Piston Ring Set (STD) – 98.5–02 5.9L Cummins 24V

OE-style standard-bore piston ring set for the 1998.5–2002 5.9L Cummins 24-valve (ISB). Built to OEM-equivalent specs for long service life, proper sealing, and restored compression. Sold per cylinder—order 6 sets for a complete engine.

• Direct replacement: Matches OEM reference Cummins 3804990 for 98.5–02 ISB applications.
• Standard bore (STD): Ideal for stock cylinders; select oversize rings if your block is overbored.
• Complete ring pack, per cylinder: Top, second, and oil control rings for one piston.
• Aftermarket value: Interstate-McBee quality at a cost well below OEM boxed parts.

Specifications

What’s Included

• (1) Cylinder ring pack: top ring, second ring, oil control assembly.

Vehicle Fitment

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

• Dodge Ram 2500/3500 — 1998.5–2002 with 5.9L Cummins 24V ISB.

Note: Earlier 12-valve years may use different ring sets; confirm part number before ordering.

Installation Tips

• Measure and set ring end-gap to spec; check ring side clearance in the piston grooves.
• Observe ring orientation and stagger end gaps per the service manual.
• Hone the cylinder properly for ring seating; clean bores thoroughly before assembly.
• Use manufacturer torque specs and recommended break-in procedure.

Warranty

New Interstate-McBee engine parts typically carry a 24-month warranty from date of installation under normal use (valvetrain exceptions may apply). Check the current Interstate-McBee policy or contact us for details.

Why Buy From CPP Diesel

• ESN-verified fitment support and real diesel techs on staff.
• Fast shipping and hassle-free returns.
• Deep B-Series inventory to complete your rebuild.

FAQ