Product Description
Cummins 4955523 — Upper Engine Gasket Set (Head & Top-End Seals) for ISB 6.7L
MPN: 4955523 | Also Known As: upper engine gasket kit, upper head gasket set | Platform: ISB6.7 (Ram), QSB6.7 (industrial)
Why This Part
- ✓ Complete top-end sealing for head service, intake/exhaust, EGR, and valve train.
- ✓ OE materials & profiles for long-term, leak-free performance.
- ✓ Direct-fit for 2011–2012 Ram 6.7L ISB; verify by VIN/ESN.
- ✓ One-box convenience to cut downtime and comebacks.
Quick Specs
| Type | Upper engine gasket set (head & top-end seals) |
|---|---|
| OE Part # | 4955523 |
| Includes | Head gasket, valve stem seals, exhaust manifold gaskets, EGR/intake gaskets, O-rings & sealing washers (kit contents may vary by revision; verify contents list) |
| Qty Required | 1 per engine (sold as a complete kit) |
| Notes | Valve cover gasket/harness may be separate depending on build; confirm contents before teardown |
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 2011–2012 | Ram 6.7L ISB (24V Common-Rail) | Ram 2500/3500 |
Industrial/Off-Highway: Common on QSB6.7 with EGR (EPA07/EPA10); always confirm by ESN.
Compatibility Notes: Some sources cite 2010–2012 coverage; Cummins/XDP/Geno’s align on 2011–2012 for Ram trucks. Verify by VIN/ESN and kit contents.
Often Paired With
- Lower Engine Gasket Set: Cummins 4955522 (’11–’12 6.7L)
- Valve Cover Gasket: Cummins 5367847 (with harness) or 4899226 (verify build)
- Head fasteners: New OE bolts or performance studs (per build)
- Fluids & filters: Fresh oil/coolant after top-end service
What’s In The Box
- (1) Genuine Cummins Upper Engine Gasket Set (4955523), sealed kit
- Content mix may vary by revision; confirm the current component list before teardown
Install Tips
- Match head gasket thickness to OE spec; clean deck surfaces meticulously.
- Follow torque/angle procedures in service manual; replace one-time-use fasteners.
- Recheck fluids and leaks after first heat cycle; retorque where specified by OE.
FAQ
WILL THIS FIT MY 2011–2012 6.7L CUMMINS RAM?Yes—this kit targets 2011–2012 Ram 2500/3500 with the 6.7L ISB. Verify by VIN/ESN for absolute accuracy.
WHAT’S INCLUDED IN THE 4955523 KIT?A comprehensive top-end seal set (head gasket, valve stem seals, EGR/intake/exhaust gaskets, O-rings, sealing washers). Exact contents can vary by production revision—check the current component list.
DOES THIS KIT INCLUDE THE VALVE COVER GASKET?Some catalogs show it included; others sell it separately. To avoid downtime, plan on ordering a valve cover gasket if your truck needs one.
IS THIS A GENUINE CUMMINS KIT?Yes—OE Cummins 4955523 for proper materials, fitment, and durability.
WHAT ELSE SHOULD I REPLACE DURING A HEAD JOB?Consider new head bolts/studs, injector sealing washers, coolant, oil & filter, and any worn hoses. Pair with lower set 4955522 if you’re doing a full reseal.
