Product Description
Cummins 5621817 — Cylinder Head Gasket (Standard Thickness, MLS) for ISB 6.7L
MPN: 5621817 | Also Known As: cylinder head gasket, head gasket (standard) | Cross-Refs: 4932210, 4929656, 68014991AB
Why This Part
- ✓ OE multi-layer steel (MLS) gasket for reliable sealing under boost and tow loads.
- ✓ Standard thickness—factory spec for stock and mild builds.
- ✓ Direct-fit for 2007.5–2018 Ram 6.7L ISB (verify by VIN/ESN).
- ✓ Built to Cummins material and sealing standards.
Quick Specs
| Type | MLS cylinder head gasket (standard thickness) |
|---|---|
| OE Part # | 5621817 |
| Cross-Refs | 4932210, 4929656, 68014991AB |
| Qty Required | 1 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 late ISB/QSB 6.7 (EPA13/Euro 6) variants—always confirm by ESN.
Often Paired With
- Head fasteners: new OE head bolts or ARP head stud kit (247-4202)
- Upper engine gasket set (for reassembly items)
- Fresh coolant & thermostat after service
- Machine shop checks: head/block flatness & surface finish (per Cummins RA spec)
What’s In The Box
- (1) Genuine Cummins Cylinder Head Gasket (5621817)
- Fasteners and additional gaskets sold separately (see “Often Paired With”).
Install Tips
- Clean and inspect deck/head; follow the factory torque sequence and angle steps.
- Use new torque-to-yield head bolts or upgrade to studs; lubricate as specified.
- Re-check fluids and pressures on first heat cycle; bleed air from cooling system.
FAQ
WILL THIS FIT MY 2007.5–2018 6.7L CUMMINS RAM?Yes—this is the OE standard-thickness head gasket for most 2007.5–2018 Ram 6.7L ISB applications (verify by VIN/ESN).
IS THIS THE STANDARD THICKNESS VERSION?Yes—5621817 is the standard-thickness MLS gasket. Thicker/thinner options are different part numbers.
DO I NEED NEW HEAD BOLTS OR STUDS?Yes—factory bolts are torque-to-yield. Replace them or upgrade to studs (e.g., ARP 247-4202) and follow the specified torque procedure.
WHAT ARE THE COMMON CROSS-REFERENCE NUMBERS?4932210, 4929656, and Mopar 68014991AB are commonly referenced for identification; order by 5621817 for OE standard thickness.
IS THIS GASKET MLS?Yes—multi-layer steel construction for durability and sealing under high cylinder pressure.
