Product Description
Interstate-McBee M-3974127 Filter Head Gasket – 07.5–18 6.7L Cummins (Aftermarket Replacement)
Direct-fit replacement gasket for the 6.7L Cummins filter head (fuel filter housing) used on 2007.5–2018 Ram HD trucks. Restores a proper seal to help prevent air intrusion and fuel leaks. Sold individually.
- Purpose-built seal: Designed for the filter head/housing interface on 6.7L ISB Cummins applications.
- OE-style fitment: Dimensions match the original profile for reliable, leak-free service.
- Service saver: Ideal when rehabbing a leaking or serviced fuel filter head.
- Value: Interstate-McBee quality at an aftermarket price.
Specifications
| Brand | Interstate-McBee |
| Part Number | M-3974127 |
| OEM Reference | Cummins 3974127 |
| Component | Filter Head / Fuel Filter Housing Gasket |
| Sold As | Each (1 gasket) |
| Typical Quantity Required | 1 per housing (verify during service) |
What’s Included
- (1) Filter head gasket, P/N M-3974127
Vehicle Fitment
Always verify by VIN or engine serial number (ESN) when possible.
- Ram 2500/3500/4500/5500 with 6.7L Cummins ISB
- Model Years: 2007.5–2018
- Additional 6.7L ISB applications using Cummins 3974127 (confirm by ESN).
Recommended/Related Parts
- Fuel filter head seals & O-ring kits (6.7L Cummins)
- Fuel filter elements (primary/secondary) for 6.7L Cummins
- Filter head mounting hardware (as needed)
Install Notes
- Depressurize the fuel system before service; catch and dispose of fuel responsibly.
- Clean mating surfaces thoroughly; do not use sealants unless the service manual specifies.
- Lightly lubricate the gasket with clean diesel or engine oil to aid seating.
- Torque fasteners to spec and prime/bleed the system per the service manual; check for leaks.
Why Buy From CPP Diesel
- ESN-verified fitment support from diesel specialists
- Fast shipping and hassle-free returns
- Deep inventory for Ram/Cummins filtration and fuel system parts
FAQ
Is this the gasket for the fuel filter housing?
Yes—this is the filter head (fuel filter housing) gasket for 6.7L Cummins ISB applications listed above.
How many do I need?
Typically one per housing. Inspect your assembly during service to confirm.
Does it include other seals or hardware?
No. This listing is for the gasket only. Pair with any required O-rings, seals, or hardware during reassembly.
