Product Description
Interstate-McBee M-3901356 T3 Turbo Inlet Gasket – 1989–2002 5.9L Cummins
High-quality replacement T3 turbo inlet gasket for the 5.9L Cummins (12-valve and early 24-valve). This gasket seals the joint between the exhaust manifold and the turbocharger turbine inlet (T3 flange). Sold individually.
- Direct fit: Designed for the factory T3 manifold/turbo interface.
- Reliable seal: Built for high heat and exhaust pressure environments.
- Service friendly: Ideal for turbo swaps, manifold jobs, or leak fixes.
- Value: Interstate-McBee quality at an aftermarket price.
Specifications
| Brand | Interstate-McBee |
| Part Number | M-3901356 |
| OEM Reference | Cummins 3901356 |
| Flange Type | T3 (turbo inlet / manifold to turbo) |
| Sold As | Each (1 gasket) |
| Position | Turbocharger turbine inlet (exhaust side) |
What’s Included
- (1) T3 turbo inlet gasket, P/N M-3901356
Vehicle Fitment
Always verify by engine serial number (ESN) if possible.
- Dodge Ram 2500/3500 5.9L Cummins
- 12-Valve: 1989–1998
- 24-Valve (early): 1998.5–2002 with T3 turbine housing
- Other B-Series 6BT/ISB applications using a T3 turbo inlet and Cummins 3901356 gasket.
Recommended/Related Parts
- Exhaust manifold to head gaskets (set)
- Turbo mounting hardware (studs/nuts)
- Downpipe V-band clamp/gasket (as applicable)
- Penetrant and surface prep supplies
Install Notes
- Allow the engine to cool fully before service.
- Clean both mating surfaces until smooth and free of carbon.
- Use new hardware where corrosion or heat cycling is evident.
- Tighten fasteners evenly in a criss-cross pattern to the service manual specification.
- Warm-up, check for exhaust leaks, and re-check fasteners after a few heat cycles.
Why Buy From CPP Diesel
- ESN-verified fitment support from diesel specialists
- Fast shipping and easy returns
- Extensive inventory of Cummins B-Series gaskets and hardware
FAQ
Will this fit my 1998.5–2002 24-valve?
Yes, as long as you’re using a T3 turbine housing. Some aftermarket turbos use T4 or other flanges—confirm your turbo inlet size before ordering.
How many do I need?
One per turbo/manifold joint. If you remove the turbo, it’s best practice to replace the gasket.
Do I need sealant?
No sealant is typically required. Install the dry gasket on clean, flat surfaces per the service manual.
