Engine · 5.9L 8-cyl
300-RL03121A Engine interchange
300-RL03121A is a Redline engine interchange code that fits 3 vehicles from 1990–1992, option 5.9L 8-cyl.
INFERRED
Inferred: matched by vehicle specs. Likely right; confirm before you sell.
Fits
| Year | Make | Model | Option |
|---|---|---|---|
| 1990 | Dodge | RAM 350 | 5.9L 8-cyl |
| 1991 | Dodge | RAM 350 | 5.9L 8-cyl |
| 1992 | Dodge | RAM 350 | 5.9L 8-cyl |
OEM numbers
How to verify
- Check the ID tag or engine code against the OEM numbers above.
- Decode the VIN to confirm year, model and powertrain.
- Compare the part physically: mounts, connectors and dimensions.
Information is a guide only. Verify fitment before sale. No warranty is given.
Last updated 2026-10-13