Product Description
FASS RK04 REPLACEMENT SYSTEM RELOCATION KIT FOR 2003–2004 DODGE RAM WITH 5.9L CUMMINS
The FASS RK04 Relocation Kit repositions your Direct Replacement Pump (DRP04) closer to the fuel tank on 2003–2004 Dodge Ram 2500/3500 5.9L Cummins trucks. By shortening the suction distance and allowing the pump to push under pressure rather than pull under vacuum, the RK04 improves priming, reduces aeration, and helps extend pump life.
Fitment & System Notes
- Vehicle: 2003–2004 Dodge Ram 2500/3500 with 5.9L Cummins.
- Intended system: For use with the FASS DRP04 Direct Replacement Fuel Lift Pump.
- Function: Moves the DRP closer to the tank to improve fuel delivery and reduce strain on the pump.
- Includes: Wiring harness, hose, and mounting hardware (per kit contents).
Installation & Manuals
Access the official FASS manuals here: FASS Installation Manuals. Direct PDF for this kit: RK-1004 Installation Manual (PDF).
Cross-Reference & Related FASS Items (CPP Diesel)
- FASS DRP04 Replacement Fuel Lift System (2003–2004 Cummins) — pump this kit relocates.
- FASS RK02 Relocation Kit (1998.5–2002 Cummins) — earlier-year counterpart.
- FASS STK1002 Suction Tube Kit — popular pairing for improved draw and plumbing.
FAQ
Do I need the RK04 if I already have a DRP04 installed?If your DRP04 is still in the stock engine-bay location, relocating it nearer the tank reduces suction distance and helps the pump prime faster and run cooler.
What comes in the RK04 kit?
Kit contents include a wiring harness, hose, and mounting hardware specific to 2003–2004 5.9L Cummins applications. See the RK-1004 manual for the full bill of materials.
Will this work on other model years?
RK04 is for 2003–2004. For 1998.5–2002 trucks, see RK02.
Specifications for Fass RK04
| Brand | FASS Fuel Systems |
| Part Number | RK04 |
| Application | 2003–2004 Dodge Ram 2500/3500 5.9L Cummins (for DRP04) |
| Includes | Wiring harness, hose, mounting hardware (see manual) |
| UPC | 850044106868 |
| GTIN | 0850044106868 |
| Shipping Weight | ~3 lb |
| Package Dimensions | 14.00" W × 5.00" H × 14.00" D |
| Shipping | Calculated at checkout |
| Prop 65 | Yes — Cancer and Reproductive Harm |
