Product Description
Interstate-McBee M-3947530 Intake Plenum Gasket – 03–18 5.9L/6.7L Cummins
Replace a leaking or disturbed intake plenum gasket with this OEM-style, stamped-steel Interstate-McBee replacement. Designed for 2003–2018 Cummins 5.9L & 6.7L ISB engines used in Dodge/Ram trucks, it restores a proper seal between the intake plenum (cover) and the manifold.
- Direct-fit aftermarket replacement: Matches Cummins 3947530 for fit and function.
- Stamped-steel construction: Durable metal gasket maintains clamping load and seal integrity.
- Service-friendly: Ideal any time the intake manifold/plenum is removed.
- Interstate-McBee quality: Built to OEM-equivalent specs from a trusted heavy-duty brand.
Vehicle Fitment
Always verify by engine serial number (ESN) when possible.
- Dodge/Ram 2500 & 3500 – Cummins 5.9L ISB (24V): 2003–2007
- Dodge/Ram 2500, 3500, 4500, 5500 – Cummins 6.7L ISB: 2007.5–2018
- Additional: Applicable to ISB/QSB B-Series platforms where OEM 3947530 is specified.
What’s Included
- (1) Intake plenum (large intake manifold cover) gasket
Install Notes
- Clean both mating surfaces; remove old gasket and debris completely.
- Inspect manifold/plenum flatness; correct as needed before reassembly.
- Follow Cummins service manual for torque sequence and final torque values.
Warranty
Interstate-McBee new engine parts are typically covered for 24 months from installation (valve-train exceptions may be 12 months). Refer to manufacturer policy for details.
Why Buy From CPP Diesel
- ESN-verified fitment support from diesel specialists
- Fast shipping and hassle-free returns
- Complementary parts in stock (manifolds, hardware, seals)
FAQ
Is this the same as Cummins 3947530?Yes. M-3947530 is Interstate-McBee’s aftermarket replacement for OEM Cummins 3947530.
Will it fit both 5.9L and 6.7L?
Yes—fits 2003–2007 5.9L ISB and 2007.5–2018 6.7L ISB Ram applications that use the large plenum cover.
What material is the gasket?
Stamped steel (metal) gasket designed to maintain a reliable seal under thermal cycling.
Do I need sealant?
Typically no. Install dry unless your Cummins service procedure specifies otherwise.
Specifications for Interstate-McBee M-3947530
| Brand | Interstate-McBee |
| Part Number | M-3947530 |
| UPC | Not specified by manufacturer/seller |
| GTIN | Not specified by manufacturer/seller |
| Shipping Info | Package weight: Not specified (gasket is light-weight, usually ships via standard ground). Other shipping dimensions/method: Not specified. |
| Cross Reference | OEM reference: Cummins 3947530 intake plenum gasket. Application: 2003–2018 5.9L / 6.7L Cummins ISB and Dodge Ram Cummins intake plenum. |
| E-Codes | Not specified |
| Prop 65 | WARNING: This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information: https://www.P65Warnings.ca.gov |
Product Videos
Custom Field
YEAR 2003-2018
MAKE DODGE
ENGINE 5.9L,6.7L
