Product Description
CUMMINS 3947530 OEM INTAKE MANIFOLD COVER GASKET (INTAKE PLENUM GASKET) – RAM 5.9L/6.7L (2003–2024)
Stop boost leaks and intake soot streaks the right way with the genuine CUMMINS 3947530 intake manifold cover gasket. This is the large OEM gasket that seals the intake plenum/intake plate to the cylinder head on 5.9L and 6.7L ISB engines. Built to Cummins factory specs with a high-temp graphite/composite sealing layer, it handles heat cycles, vibration, and boost pressure far better than cheap paper knockoffs—perfect for stock daily drivers, heavy tow rigs, and tuned street trucks that still rely on OEM-style intake hardware.
Whether you’re refreshing a high-mile engine, installing a grid-heater delete or performance intake horn, or resealing after head work, reusing the old gasket is asking for boost leaks and driveability issues. This Cummins 3947530 gasket is the same part number used in dealer service kits, so you get OE fit and long-term reliability with zero guesswork.
Verified Fitment – Dodge Ram / Cummins ISB
Automotive (Ram Pickups)
- 2003–2007 Ram 2500/3500 5.9L Cummins (24-valve common-rail) – seals the large intake plate/plenum to the cylinder head.
- 2007.5–2018 Ram 2500/3500 6.7L Cummins – used on OEM-style intake plenum/grid heater setups.
- 2019–2024 Ram 2500/3500 6.7L Cummins – commonly used with OE-style intake plenums; always verify by VIN/ESN or plenum casting if the engine has been replaced or modified.
Industrial / Off-Highway (ISB/QSB)
- Selected ISB/QSB 5.9L & 6.7L engines using the same style intake manifold cover. Always confirm by engine serial number (ESN) in Cummins QuickServe or equivalent catalog.
Note: Many catalogs list this gasket as covering 2003–2018 Ram 5.9L/6.7L; real-world fitment often extends into later 6.7L applications when the OEM-style plenum is retained. When in doubt on 2019+ trucks, verify by VIN/ESN.
Why Choose Genuine Cummins 3947530?
- OE material & thickness – graphite/composite gasket designed for boosted diesel intake temps and clamping loads.
- Correct bore and bolt pattern – lines up with the factory cylinder head and intake plate, no slotting or trimming.
- Better sealing vs. cheap copies – helps maintain boost, throttle response, and even EGT balance across cylinders.
- Perfect for service or mods – ideal whenever the intake plate, grid heater, or performance horn is removed.
Pair this gasket with fresh hardware and a thorough cleaning of the intake and head sealing surfaces for the best possible seal.
Cross-Reference / Related Parts (Cummins-Only Links)
- CUMMINS 3938152 – Intake manifold cover gasket for earlier 1989–2002 5.9L B-Series engines (small intake plate).
» CUMMINS 3938152 OEM INTAKE MANIFOLD COVER GASKET – 5.9L (1989–2002) - CUMMINS 3969988 – Intake heater grid gasket for 1989–2007 5.9L applications; often replaced when servicing the intake horn/grid heater area.
» CUMMINS 3969988 OEM INTAKE HEATER GRID GASKET – 5.9L CUMMINS (1989–2007) - CUMMINS 3963379 – Rocker lever cover (rocker box) gasket for 2003–2024 5.9L/6.7L; commonly serviced alongside top-end sealing work.
» CUMMINS 3963379 OEM ROCKER LEVER COVER GASKET (ROCKER BOX GASKET) – 5.9L/6.7L
Non-Cummins cross-reference numbers (ID only – NOT Cummins branded): Mahle MS19355, Chrysler 5086829AA, 5086868AC, 68005184AA, PAI 131693, various aftermarket “large” intake manifold/plenum gasket kits.
Installation Notes
- Remove the intake plate/plenum and thoroughly clean both the cylinder head and cover sealing surfaces.
- Inspect for erosion, heavy pitting, or gouges; repair or replace components as needed.
- Install the new Cummins 3947530 gasket dry (no RTV) unless the service manual calls out sealant at specific joints.
- Torque intake fasteners to OEM spec in a criss-cross pattern and re-check after an initial heat cycle.
FAQ
Will this gasket fit my 2003–2007 5.9L Cummins Ram?
Yes. Cummins 3947530 is the correct large intake manifold cover (plenum) gasket for most 2003–2007 Ram 2500/3500 5.9L common-rail engines that use the factory-style intake plate. Always confirm by VIN/ESN if the engine or head has been changed.
Does this work on 6.7L Cummins trucks?
Yes, this gasket is widely cataloged for 2007.5–2018 6.7L Ram pickups using the OEM-style intake plenum and grid heater. Many real-world applications extend to newer 2019–2024 6.7L trucks with the same intake configuration. On late-model trucks, we recommend confirming fitment by VIN/ESN or comparing your original gasket.
Is this a genuine Cummins part or aftermarket?
This listing is for a genuine Cummins 3947530 gasket, not an aftermarket reproduction. It matches the OE material, thickness, and bolt pattern used in dealer and factory service.
Do I need to replace any other gaskets at the same time?
Any time the intake system is apart, it’s smart to inspect and replace related seals as needed. Commonly paired items include the intake heater grid gasket (Cummins 3969988), upper intake horn gasket, and in some cases the rocker box gasket (Cummins 3963379) if you are deep into top-end service.
Will this affect emissions or tuning?
No. This gasket is an OEM replacement sealing component and does not change airflow design, emissions strategy, or tuning. When installed correctly, it simply restores a leak-free path for intake air.
Specifications for cummins 3947530
| Specifications for cummins 3947530 | |
|---|---|
| Brand | Cummins (Genuine OEM) |
| Part Number | 3947530 |
| UPC | 0832313084961 |
| GTIN | 00832313084961 |
| Application – Engine | 5.9L ISB (24V common-rail), 6.7L ISB |
| Application – Vehicles | 2003–2024 Ram 2500/3500 (5.9L & 6.7L Cummins) – verify by VIN/ESN on 2019+ applications |
| Location | Intake manifold cover / plenum to cylinder head sealing gasket (large intake plate gasket) |
| Material | Graphite/composite OE-style sealing material |
| Typical Dimensions* | Approx. 21" length x 8–10" width x <0.1" thickness (for reference only) |
| Approx. Shipping Weight* | ~0.2 lb (single gasket, flat-packed) |
| Cross Reference (ID only) | Mahle MS19355; Cummins 3969988 (set interchange); Chrysler 5086829AA, 5086868AC, 68005184AA; PAI 131693; various OE-equivalent “large intake manifold gasket” listings |
| E-Codes / Emissions | Replacement sealing component; maintains OEM emissions configuration when used with stock hardware |
| Country of Origin | As marked on Cummins packaging (varies by batch) |
| Prop 65 | WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov |
| Shipping Info | Ships flat in reinforced packaging via standard ground service |
*Dimensions and weight are approximate and for shipping/handling reference only.
