Product Description
Cummins 3920868 — Exhaust Valve (4BT/6BT, 5.9L 12-Valve)
MPN: 3920868 | Also Known As: valve, exhaust valve | Common Cross-Refs: 3802356, 4895188, 3901607, 3901608, 191968, J920868
Why This Part
- ✓ OE valve geometry & metallurgy for precise sealing and long service life.
- ✓ Direct-fit for 1989–1998 5.9L 12-valve (plus 4BT/6BT industrial—verify by ESN).
- ✓ Restores power & emissions when your originals are worn, burnt, or pitted.
- ✓ Works perfectly with OE keepers, locks, and springs.
Quick Specs
| Type | Exhaust valve |
|---|---|
| OE Part # | 3920868 (crosses 3802356, 4895188, 3901607, 3901608, 191968, J920868) |
| Qty Required | 6 per 5.9L 12-valve engine (sold individually) |
| Key Dimensions* | Head Ø ~41.88 mm · Stem Ø ~7.95 mm · Overall length ~128.90 mm |
*Dimensions are typical reference values for 4B/6B spec; always verify by ESN if mixing components.
Verified Fitment (Automotive)
| Year Range | Engine | Chassis |
|---|---|---|
| 1989–1998 | 5.9L Cummins 12-Valve (6BT) | Dodge/Ram 2500 & 3500 |
Industrial/Off-Highway: 4BT3.9/6BT5.9 and other B-Series applications—confirm by ESN and head casting.
Often Paired With
- Intake Valve: Cummins 3920867 (matching 12-valve intake)
- Valve Stem Seals: Cummins 3921640
- Keepers/Locks: Cummins 3900250
- Valve Springs: OE or HD upgrade depending on cam/boost goals
What’s In The Box
- (1) Genuine Cummins Exhaust Valve (3920868)
- Related hardware sold separately (see “Often Paired With”).
Install Tips
- Inspect guides, seats, and spring pressures; replace worn components.
- Lap/seat per factory procedure; verify installed height and lash.
- Always follow Cummins service manual and torque specs.
FAQ
WILL THIS FIT MY 1989–1998 5.9L 12-VALVE CUMMINS?Yes—3920868 is the OE exhaust valve for B-Series 12-valve applications used in 1989–1998 Ram 2500/3500 (verify by ESN/head casting).
HOW MANY EXHAUST VALVES DO I NEED?A 12-valve 5.9L uses 6 intake and 6 exhaust valves. Order 6 pcs of 3920868 for a full exhaust set.
WHAT ARE THE COMMON CROSS-REFERENCE NUMBERS?3802356, 4895188, 3901607, 3901608, 191968, J920868. These are frequently used interchange numbers for the same spec.
IS THIS A GENUINE CUMMINS PART?Yes—OE Cummins 3920868 for correct sealing, materials, and longevity.
DO I NEED MACHINE WORK WHEN REPLACING VALVES?Strongly recommended to inspect/refresh the seats and guides; proper seating and installed height are critical for longevity.
