Product Description
The CUMMINS 3926381 OEM INTAKE MANIFOLD GRID HEATER & PLENUM, also known as the intake manifold cover, is designed for 1989–1998 5.9L 12-Valve Cummins diesel engines. This genuine Cummins component mounts between the intake horn and intake manifold while housing the factory grid heater system that aids cold-weather starting and improves intake air heating.
Use this part when replacing a damaged, corroded, cracked, or missing intake plenum assembly. Proper operation of the intake grid heater helps improve cold-weather drivability and starting performance. Always verify fitment by engine serial number before ordering.
FEATURES
- Genuine Cummins OEM intake manifold grid heater and plenum assembly
- Direct-fit replacement for applicable 5.9L 12-Valve Cummins engines
- Supports factory cold-start grid heater operation
- Restores proper intake airflow routing and sealing
- Designed to meet original Cummins specifications
- Ideal for maintenance, restoration, or repair projects
FITMENT
- 1989–1993 Dodge Ram D/W 250 and 350 5.9L Cummins 12-Valve
- 1994–1998 Dodge Ram 2500/3500 5.9L Cummins 12-Valve
- Select industrial and commercial 5.9L Cummins applications
WHAT'S INCLUDED
- 1 Cummins 3926381 OEM Intake Manifold Grid Heater & Plenum Assembly
CROSS-REFERENCE AND RELATED PRODUCTS
- Cummins 3926381
- Cummins Intake Horn Components
- Cummins Grid Heater Hardware and Electrical Components
- Cummins Intake Manifold Gaskets and Seals
SPECIFICATIONS
- Manufacturer: Cummins
- Part Number: 3926381
- Part Type: Intake Manifold Grid Heater & Plenum Assembly
- Engine Compatibility: 5.9L 12-Valve Cummins
- Fitment Years: 1989–1998
- Vehicle Application: Dodge Ram 250, 350, 2500, and 3500
- Condition: New OEM Cummins
- Material: OEM Cast Aluminum Assembly
- Installation Type: Direct Replacement
FAQ
Will this intake manifold plenum fit my truck?
This assembly fits 1989–1998 5.9L 12-Valve Cummins applications. Always verify fitment by engine serial number before ordering.
What does the grid heater do?
The grid heater warms incoming air during cold-weather starts to improve combustion, starting performance, and engine operation in low temperatures.
Is this a genuine Cummins part?
Yes. Cummins 3926381 is a genuine OEM Cummins intake manifold grid heater and plenum assembly.
Can a damaged plenum affect engine performance?
Yes. Cracks, leaks, or damaged mounting surfaces can create intake leaks and reduce proper airflow into the engine.
What is included with this part?
This listing includes the Cummins 3926381 intake manifold grid heater and plenum assembly as supplied by Cummins.
Do I need any related parts?
Inspect intake horn gaskets, manifold gaskets, electrical connections, grid heater terminals, and mounting hardware during installation and replace worn components as necessary.
