Product Description
The Cummins 5621817 OEM Cylinder Head Gasket is the factory-standard thickness head gasket designed for 2007.5–2018 ISB 6.7L Cummins engines. Using genuine Cummins gaskets ensures precise combustion sealing, correct coolant/oil passage alignment, and long-term durability under high cylinder pressure. Whether you're refreshing a daily-driven 6.7L, repairing an overheat issue, or rebuilding a work truck, this OEM gasket delivers the exact sealing performance Cummins engineered for the ISB platform.
This standard-thickness gasket is used when no deck machining or cylinder head cutting has altered OEM specifications. For engines requiring adjusted gasket thickness, Cummins offers alternate sizes by ESN (Engine Serial Number).
Fitment
- 2007.5–2018 Dodge Ram 2500 / 3500 / 4500 / 5500 with 6.7L ISB Cummins
- ISB 6.7L industrial/off-highway platforms (verify by ESN)
- Standard-thickness requirement for unmachined blocks and cylinder heads
Note: For best results, always confirm exact head gasket thickness by ESN before ordering.
Cross-Reference (Cummins-Only)
Related Cummins ISB 6.7L sealing and top-end components:
• Cummins 4932210 OEM Upper Gasket Set – ISB 6.7L
• Cummins 4892798 OEM Lower Gasket Set – ISB 6.7L
• Cummins 3949792 OEM Cylinder Head Bolt Set – ISB 6.7L
FAQ
Is this the standard-thickness head gasket for a 6.7L Cummins?
Yes. Cummins 5621817 is a standard-thickness gasket and is correct for engines with OEM deck height and head thickness.
Should I replace head bolts when installing a new head gasket?
Yes. Cummins recommends installing new OEM head bolts when replacing the gasket to ensure proper clamping force.
Can this gasket be used on a resurfaced head?
If the head or block has been machined, your engine may require a different gasket thickness. Always verify with ESN measurement values.
Is this gasket compatible with performance tuning?
Yes, but engines running elevated boost levels should also use new OEM head bolts or consider studs depending on power goals.
Specifications for cummins 5621817
| Specification | Value |
|---|---|
| Brand | Cummins Genuine Parts |
| Part Number | 5621817 |
| Thickness | Standard OEM Thickness |
| UPC | Not Published |
| GTIN | Not Published |
| Cross Reference | Replaces/used with various ISB 6.7L gaskets depending on ESN |
| E-Codes | Applicable to ISB emissions ranges (2007.5–2018) |
| Shipping Weight | 2.0 lbs |
| Package Dimensions | 30 x 10 x 1 in |
| Prop 65 Warning | Not Applicable |
