Product Description
Cummins 4376345 — Engine Piston Kit (Standard Bore, Marine Bowl)
MPN: 4376345 | Also Known As: piston & ring kit, piston assembly | Cross-Refs: 4309285 (ID only)
Genuine Cummins piston kit engineered for EPA13-era ISB/QSB 6.7L applications. Includes piston, ring pack, wrist pin, and pin clips. Sold individually (1 per cylinder)—order 6 for a complete set. :contentReference[oaicite:0]{index=0}
Why This Part
- ✓ OE metallurgy & bowl geometry for durability and emissions-era combustion design.
- ✓ Direct-fit for many ISB 6.7L applications (verify by VIN/ESN, piston grade, and bowl style).
- ✓ Complete kit (piston, rings, pin, clips) simplifies service. :contentReference[oaicite:1]{index=1}
- ✓ Built to Cummins factory specs for long service life.
Quick Specs
| Type | Engine piston kit (STD bore, marine bowl) |
|---|---|
| OE Part # | 4376345 (cross-ref 4309285) |
| Contents | Piston, rings, wrist pin, pin clips |
| Qty Required | 6 per engine (sold individually) |
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 2007.5–2018 | Ram 6.7L ISB (24V Common-Rail) | Ram 2500/3500 |
Industrial/Off-Highway: Used primarily on EPA13 ISB/QSB 6.7L variants—always confirm by ESN. Not intended for 2003–2007 5.9L. :contentReference[oaicite:2]{index=2}
Often Paired With
- Upper/Lower Gasket Sets: 4376090 (upper), 4376091 (lower)
- Main & Rod Bearings: ISB/QSB 6.7L (match by VIN/ESN)
- Head Bolts/Studs: factory bolts or ARP studs
- Oil Cooler & Gaskets: 3975818 cooler, 3974127 & 2830559 gaskets
What’s In The Box
- (1) Genuine Cummins Piston Kit (4376345): piston, rings, wrist pin, pin clips
- Order quantity 6 for a full engine set.
Install Tips
- Verify piston grade/bowl style by VIN/ESN; measure cylinder for standard bore.
- Observe ring orientation and end gaps per Cummins procedure.
- Torque fasteners to spec; recheck after initial heat cycle.
FAQ
WILL THIS FIT MY 2007.5–2018 6.7L CUMMINS RAM?Yes—this OE kit targets many 2007.5–2018 ISB 6.7L applications. Always confirm by VIN/ESN and piston grade/bowl style before ordering. :contentReference[oaicite:3]{index=3}
WHAT’S INCLUDED IN THE KIT?One cylinder’s components: piston, ring pack, wrist pin, and pin clips. Order six kits for a complete engine. :contentReference[oaicite:4]{index=4}
IS THIS A STANDARD-BORE PISTON?Yes—4376345 is commonly listed as a standard-bore kit for EPA13 6.7L ISB/QSB. Verify cylinder dimensions during teardown. :contentReference[oaicite:5]{index=5}
WHAT ARE THE RELATED OR CROSS NUMBERS?Common cross-reference: 4309285 (identification only). Use 4376345 to order the current OE kit. :contentReference[oaicite:6]{index=6}
DO I NEED ANYTHING ELSE TO COMPLETE THE JOB?Plan on gasket sets (upper/lower), bearings, and head bolts/studs. Replace the oil cooler/gaskets if debris or overheating occurred.
