Product Description
Cummins 4955354 — Genuine Upper Engine Gasket Kit (Standard Thickness) for ISB 6.7L
MPN: 4955354 | Also Known As: upper head gasket set, top-end gasket kit | Includes: standard-thickness head gasket (see contents list)
Genuine Cummins upper engine gasket kit to service the top end of your 6.7L ISB. Direct-fit for 2007.5–2018 Ram 2500/3500 6.7L Cummins and widely used on ISB/QSB 6.7 industrial variants (verify by ESN). Built to OE materials and sealing specs for long-term durability.
Features & Benefits
- Standard-thickness head gasket for stock deck and head dimensions.
- OE-grade materials and sealing surfaces for leak-free service.
- Complete top-end set streamlines a head-gasket job—no last-minute parts runs.
- Exact-fit for 6.7L ISB; optimized for emissions-era cooling/oiling passages.
- Cummins-backed quality for proper fit, function, and longevity.
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 2007.5–2018 | Ram 6.7L ISB (24V Common-Rail) | Ram 2500/3500 (select 4500/5500 upfits by ESN) |
Industrial/Off-Highway: ISB6.7/QSB6.7 (EPA-07 era and later depending on CPL)—verify by ESN before ordering.
Compatibility Notes:
- This set is the standard-thickness option commonly used on 2007.5–2018 Ram 6.7L ISB. Some suppliers list coverage into 2019–2020; always confirm by VIN/ESN for late-model trucks due to running changes.
- If your head/block have been machined, select the appropriate thickness head gasket for your measured piston protrusion.
Specifications
- Type: Upper engine/head gasket kit
- Head Gasket: Standard thickness (included in kit)
- OE Part Number: 4955354
- Common Cross-Ref (packaging): Mopar 68005262AA
- Quantity Required: 1 kit per engine
Key Contents (Identification)
Includes a comprehensive set of OE seals and gaskets for the top end, such as: cylinder head gasket 4932210, exhaust manifold gaskets 3955339 (x6), valve stem seals 3955393 (x24), rocker lever housing gasket 3963379, injector seals 3976371 (x6), turbo gasket 3977338, multiple connection gaskets (e.g., 3949910, 3958716, 4940849, 4943533), EGR valve gaskets 3979769 (x2), sealing washers 3963990 (x11), oil drain gasket 4931365 (often superseded in service), plus O-rings 3089240, 3678603, 3678786, 3977393, intake cover gasket 3947530, exhaust outlet connection gasket 4933225, connection gaskets 4933235 (x2), and lock plates 4933628 (x2). Exact contents may vary by revision; verify by ESN.
Often Paired With
- Head fasteners: OE head bolts or ARP 247-4202 head studs (torque per manufacturer spec)
- Valve cover gasket with harness: 5367847 (’06–’24 coverage varies—confirm by VIN)
- Lower engine gasket kit: 4955355 / 4376091 (year-dependent)
What’s In The Box
- (1) Cummins Upper Engine Gasket Kit (4955354) with standard-thickness head gasket
- Install sheet not included—follow Cummins service procedures.
Installation Tips
- Measure piston protrusion and head/block flatness; select thickness accordingly if surfaces were machined.
- Clean all mating surfaces; chase threads; verify dowel alignment.
- Use new fasteners or studs; follow the correct torque + angle sequence in stages.
- Re-torque/check fluids after heat cycle; burp cooling system and verify no combustion gases in coolant.
FAQ
WILL THIS FIT MY 2007.5–2018 6.7L CUMMINS RAM?
Yes—4955354 is the OE upper engine gasket kit for most 2007.5–2018 6.7L ISB applications. Confirm by VIN/ESN for late years or cab/chassis variants.
IS THE HEAD GASKET STANDARD THICKNESS?
Yes—this kit includes the standard-thickness head gasket. If your head/block were machined, verify required thickness before assembly.
WHAT EXACTLY IS INCLUDED?
The kit covers the complete top-end seals (head gasket, exhaust manifold gaskets, valve stem seals, injector/coolant/turbo/EGR seals, washers, and connection gaskets). See the contents callout above.
DO I NEED HEAD STUDS?
OE bolts work for stock power. For tuned/towed hard use, many builders upgrade to ARP 247-4202 studs for added clamping.
DOES THIS FIT INDUSTRIAL ISB/QSB 6.7?
Frequently, yes—this kit is common on ISB/QSB 6.7 platforms, but you should verify by Engine Serial Number (ESN) and CPL before ordering.
