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.

Specifications

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