Product Description
Interstate-McBee M-4089263 Upper Engine Gasket Set (Rear Gear) — 2003–2007 5.9L Cummins
Premium aftermarket upper engine gasket set engineered for the 2003–2007 5.9L Cummins ISB (24-valve, rear gear train). Built to OE form, fit, and function for reliable sealing during top-end service and overhaul.
- Rear gear application: Correct for common-rail 5.9L Cummins with the rear-mounted gear train (’03–’07).
- Complete top-end coverage: Includes the critical gaskets and seals needed when servicing the cylinder head and related components.
- Interstate-McBee quality: Consistent material spec and fit for long-term durability.
Specifications
| Brand | Interstate-McBee |
| Part Number | M-4089263 |
| Application | 5.9L Cummins ISB, common-rail, 24-valve (rear gear train) |
| Model Years | 2003–2007 |
| Position | Upper engine (top-end) gasket set |
| Sold As | Kit (see contents below) |
Typical Contents
Exact contents may vary by production run. Use the product images/notes to verify the current kit bill of materials.
- Cylinder head gasket*
- Valve cover gasket(s) / perimeter seals
- Intake and exhaust manifold gaskets
- Injector hold-down and crossover seals / copper washers
- Rocker box / overhead seals and grommets
- Turbocharger oil feed/return and compressor outlet gaskets
- EGR-related gaskets and o-rings (if equipped)
- Thermostat housing and water outlet gaskets
- Misc. top-end o-rings and seals
*Some upper sets are supplied with the head gasket; others require purchasing the head gasket separately. Check the contents list for this kit before ordering.
Vehicle Fitment
- Dodge Ram 2500/3500 with 5.9L Cummins ISB (24-valve common-rail), model years 2003–2007
- Other 5.9L ISB applications using the rear gear train in this year range (verify by ESN)
Install Notes
- Verify engine serial number (ESN) and rear-gear configuration before ordering.
- Clean and inspect mating surfaces; follow Cummins torque specs and sequence.
- Replace torque-to-yield head bolts if removed; consider head studs for performance/boosted setups.
- Lubricate o-rings with clean engine oil; avoid seal twisting during install.
Recommended/Related Parts
- Head bolts or head studs (ARP or OE)
- Exhaust manifold hardware kit
- Injector o-ring/copper washer set (as applicable)
- Coolant and oil filter (for post-service fluid change)
Why Buy From CPP Diesel
- ESN-verified fitment support
- Fast shipping and hassle-free returns
- Deep inventory of 5.9L Cummins overhaul components
FAQ
Does this fit my 2003–2007 5.9L Cummins?
Yes, this set is intended for the common-rail 5.9L ISB with the rear gear train used from 2003–2007. If you’re unsure, provide your ESN and we’ll confirm.
Is the head gasket included?
Some M-4089263 kits include the head gasket, while others do not. Check the current contents list on this product page or contact us to verify.
Do I need new head bolts?
If head bolts are torque-to-yield or show any sign of stretching/corrosion, replace them. Many customers upgrade to studs during head service.
