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INTERSTATE MCBEE

INTERSTATE-MCBEE M-3802421 PISTON RING SET STD 89–98 5.9L CUMMINS (AFTERMARKET REPLACEMENT)

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SKU:
MCBM-3802421
MPN:
M-3802421
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  • INTERSTATE-MCBEE M-3802421 PISTON RING SET STD 89–98 5.9L CUMMINS (AFTERMARKET REPLACEMENT)
  • INTERSTATE-MCBEE M-3802421 PISTON RING SET STD 89–98 5.9L CUMMINS (AFTERMARKET REPLACEMENT)
$23.82

Description

Interstate-McBee M-3802421 Piston Ring Set (Standard) – 89–98 5.9L Cummins 12-Valve

OE-style standard bore piston ring set for 1989–1998 Dodge Ram 2500/3500 5.9L Cummins 12-valve (6BT). Built to OEM-equivalent specs for reliable sealing, proper oil control, and long service intervals.

  • Application-correct: Designed for 5.9L Cummins 6BT (12-valve) truck engines (1989–1998).
  • Standard bore size: 102.0 mm (4.016") cylinder bore (STD).
  • Sold per piston: One set services one piston—order 6 sets for a complete engine.
  • Aftermarket value: Interstate-McBee quality at a fraction of OEM boxed pricing.

Specifications

Brand / Part No. Interstate-McBee M-3802421
OEM Cross-Reference Cummins 3802421 (select B-Series)
Additional Cross-Refs 3802050, 3802056, 3802230, 3802746
Engine Family Cummins B-Series (focus: 6BT 5.9L 12-valve)
Bore Size Standard (STD) — 102.0 mm / 4.016"
Quantity Per piston set (6 required for full engine)

Vehicle Fitment

Best practice: verify by engine serial number (ESN) if your build is non-stock.

  • Dodge Ram 2500 / 35001989–1998 with 5.9L Cummins 12-valve (6BT)

Note: This ring set is also referenced for select 4B/6B industrial B-Series applications; truck fitment above is the primary focus of this listing.

Installation Tips

  • Measure bores and confirm STD sizing; hone/deglaze as required and check end-gap.
  • Stagger ring gaps per service manual; observe top/second ring orientation markings.
  • Follow Cummins torque specs and clean-room practices during assembly.

Warranty

Interstate-McBee new engine components include manufacturer warranty coverage. Contact us for specific term details on ring sets.

Why Buy From CPP Diesel

  • Diesel-specialist support with ESN-verified fitment assistance.
  • Fast shipping and easy returns.
  • Strategic inventory of B-Series wear items for one-trip rebuilds.

FAQ

Will these rings fit my 1996 5.9L Cummins?
Yes. This listing targets 1989–1998 12-valve 6BT truck applications. Always confirm your engine is standard bore before ordering.
How many sets do I need for a full rebuild?
The kit is sold per piston. You’ll need six (6) sets for a complete engine.
What does “STD” mean?
“STD” indicates standard bore size (102.0 mm / 4.016") as originally manufactured. Oversize rings require matching oversize pistons and machining.
Does this work on 24-valve ISB engines?
This listing is focused on 12-valve (1989–1998). Later ISB 24-valve engines use different ring part numbers.
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Additional Information

YEAR:
1989-1998
MAKE:
DODGE
ENGINE:
5.9L
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