Product Description
The Cummins 3920868 OEM Exhaust Valve is a genuine, high-temperature exhaust valve engineered for 5.9L 12-Valve Cummins 6BT (1989–1998), as well as 4BT and B-Series industrial applications. Manufactured from premium heat-resistant alloys, this valve ensures correct lift, sealing, and durability under the extreme exhaust temperatures produced by turbocharged diesel engines. Whether you're refreshing a 12-Valve head, rebuilding a 4BT engine, or maintaining equipment powered by a B-Series diesel, this genuine Cummins exhaust valve guarantees OEM reliability and long-term performance.
Fitment
- 1989–1998 Dodge Ram 2500/3500 with 5.9L 12-Valve Cummins (6BT)
- Cummins 4BT (3.9L) B-Series industrial/automotive applications
- Cummins 6BT (5.9L) B-Series industrial/automotive engines
- Direct replacement for OEM exhaust valve specifications
Note: For industrial/off-highway engines, confirm via ESN for exact valve type and seat/guide compatibility.
Cross-Reference (Cummins-Only)
Related Cummins valvetrain components for 4BT & 6BT engines:
• Cummins 3904409 OEM Valve Stem Guide – 51.75mm
• Cummins 3904408 OEM Valve Stem Guide – 60.50mm
• Cummins 3903924 OEM Timing Pin – 12-Valve
FAQ
Is this the correct exhaust valve for all 12-Valve 5.9L engines?
Yes. This Cummins 3920868 exhaust valve fits all 1989–1998 5.9L 12-Valve Cummins engines, including Dodge Ram and industrial variants.
Does this exhaust valve fit 4BT engines?
Yes — this OEM valve is used in many 3.9L 4BT B-Series applications. Always verify by ESN for industrial engines.
Should exhaust valves be replaced during a head rebuild?
Yes. Over time, exhaust valves become worn from heat cycling and carbon buildup. Replacing them with genuine Cummins valves ensures long-term sealing and performance.
Do I need to machine the seats when installing new exhaust valves?
Typically yes. A proper valve job ensures correct seating, sealing, and valve height after installation.
Are these safe for mild performance upgrades?
Yes. OEM Cummins exhaust valves handle towing, utility, and mild performance levels without issue. High-RPM or extreme builds may require performance valves.
Specifications for cummins 3920868
| Specification | Value |
|---|---|
| Brand | Cummins Genuine Parts |
| Part Number | 3920868 |
| Component Type | Exhaust Valve |
| Engine Compatibility | 5.9L 12-Valve (6BT), 3.9L 4BT, B-Series |
| UPC | Not Published |
| GTIN | Not Published |
| Cross Reference | Supersedes earlier Cummins exhaust valve part numbers depending on ESN |
| E-Codes | N/A |
| Shipping Weight | 0.10 lbs |
| Package Dimensions | 4 x 1 x 1 in |
| Prop 65 Warning | Not Applicable |
