Product Description
Cummins 4376091 — Lower Engine Gasket Kit for ISB 6.7L
MPN: 4376091 | Also Known As: lower gasket kit, bottom-end gasket set | Typical Contents: oil pan gaskets, crank seal, cooler & filter head gaskets, O-rings, cover gaskets
Why This Part
- ✓ Complete bottom-end reseal for 6.7L builds or leak repairs.
- ✓ Direct-fit OE kit for 2013–2018 Ram 6.7L ISB (verify by VIN/ESN).
- ✓ Includes key seals & gaskets (oil pan, front/rear structure, cooler & filter interfaces, etc.).
- ✓ OE materials for durability and long service life.
Quick Specs
| Type | Lower (bottom-end) engine gasket kit |
|---|---|
| OE Part # | 4376091 |
| Automotive Coverage | Ram 6.7L ISB (2013–2018) |
| Qty Required | 1 per engine (sold as a kit) |
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 2013–2018 | Ram 6.7L ISB (24V Common-Rail) | Ram 2500/3500 |
Industrial/Off-Highway: Also used across ISB/QSB 6.7 EPA13+ variants; verify by ESN before ordering.
Often Paired With
- Upper Engine Gasket Kit: Cummins 4955354 (’07.5–’18 6.7L)
- Oil Pan: Dorman 264-860 (’13–’24 6.7L)
- Sealants & cleaners: brake cleaner, RTV where specified, lint-free wipes
What’s In The Box
- Complete lower gasket set (1 kit), OE Cummins 4376091
- Oil cooler & filter head gaskets: 2830559, 2831077, 3974127
- Oil pan gaskets: 4337596, 4337615, 4934344
- Seals & O-rings: 3046201 (x2), 3678786, 3678912 (M14), 3678925 (M10), 3910260, 3946188, 4994574
- Rectangular ring seals: 3906697, 3906698, 4983908 (x2)
- Cover/structure gaskets & hardware: 3863863, 3939258, 3949562, 3963990, 4896897, 4898301
- Crank seal: 5259499
Exact contents per Cummins kit bill of materials.
Install Tips
- Thoroughly clean mating surfaces; follow torque sequences & specs.
- Replace any warped/damaged covers or pans; inspect for crankcase pressure issues.
- Use proper sealant where specified by Cummins; allow full cure before startup.
FAQ
WILL THIS FIT MY 2013–2018 6.7L CUMMINS RAM?Yes—this kit is the OE lower engine gasket set for 2013–2018 6.7L ISB Ram 2500/3500 (confirm by VIN/ESN).
WHAT EXACTLY IS INCLUDED IN 4376091?It’s a comprehensive bottom-end reseal kit including oil pan gaskets, cooler & filter head gaskets, front/rear structure gaskets, rectangular ring seals, multiple O-rings, a sealing washer, and a crankshaft seal. See “Kit Contents” for key P/Ns.
DO I ALSO NEED THE UPPER ENGINE GASKET KIT?If your job involves head removal or top-end work, pair this with the upper kit (4955354). For bottom-end only, 4376091 is typically sufficient.
IS THIS A GENUINE CUMMINS KIT?Yes—OE Cummins 4376091 with factory-grade materials and fitment.
DOES THIS FIT 2007.5–2012 6.7L OR 5.9L ENGINES?Automotive listing targets 2013–2018 6.7L. Earlier or other platforms may use different kits—always verify by VIN/ESN.
