Product Description
Upgrade the reliability and fuel delivery of your 1998.5–2002 Dodge Ram Cummins 5.9L 24V (VP44) with the AIRDOG R4SBD355 RP-4G-100 Raptor lift pump. This application is engineered specifically for trucks that use the factory in-tank lift pump, providing a stable 15–17 PSI supply to protect the VP44 and support mild performance tuning.
Vehicle Fitment
- 1998.5–2002 Dodge Ram 2500/3500, 5.9L Cummins 24-Valve (VP44), with in-tank lift pump
Why Choose the Raptor 4G RP-100
- Frame-rail mounted, compact 4G motor with integral pressure regulator
- Designed for VP44 fuel system needs; ideal for stock to mild builds
- Includes fuel module upgrade to properly draw through a 1/2" bulkhead fitting
Installation Instructions
Download the official Airdog install manual for this exact in-tank application:
Raptor 4G 100/150 – 1998.5–2002 Cummins WITH in-tank pump – Install Manual (PDF)
Cross-Reference / Related Airdog Options
- AIRDOG R3SBD100 FRRP-100 Factory Replacement Raptor Pump (98.5–02 Cummins)
- AIRDOG R4SBD356 RP-4G-100 Raptor (03–04 Cummins WITH in-tank)
- AIRDOG II-5G A7SPBD354 DF-100-5G (98.5–04 Cummins WITH in-tank)
- AIRDOG II-5G A7SPBD253 DF-100-5G (98.5–04 Cummins WITHOUT in-tank)
- AIRDOG A4SPBD104 FP-150-4G (98.5–04 Cummins)
- AIRDOG R4SBD050 RP-4G-100 (2004.5–2018 Cummins)
- AIRDOG R4SBC133 RP-4G-100 (01–10 Duramax LB7/LLY/LBZ)
FAQ
Will this R4SBD355 work if my truck does NOT have the factory in-tank pump?
No—this part number is specifically for trucks with the in-tank lift pump. If your 1998.5–2002 truck does not have the in-tank pump, choose a different Airdog kit designed for block-mounted/no in-tank applications.
What fuel pressure should I expect at the VP44 with the RP-4G-100?
For a stock VP44 setup, the Raptor 4G RP-100 is typically set around 15–17 PSI at the factory. Always verify with a gauge after installation and adjust if needed.
Do I need a return line with the Raptor 4G RP-100?
No. The RP-4G-100 is internally regulated and does not require a dedicated return line for this application.
Does this kit include the draw straw / fuel module upgrade?
Yes. The kit includes a fuel module upgrade that pulls through a 1/2" bulkhead fitting to properly bypass the factory in-tank lift pump.
Specifications for airdog R4SBD355
| Brand | Airdog (PureFlow) |
| Part Number (MPN) | R4SBD355 (RP-4G-100) |
| Flow Rate | 100 GPH (RP-100) |
| Vehicle Compatibility | 1998.5–2002 Dodge Ram 2500/3500, 5.9L 24V Cummins (VP44) with factory in-tank lift pump |
| UPC | 813094013555 |
| GTIN | 813094013555 |
| Shipping Weight | ~17 lb |
| Package Dimensions | Approx. 12 in x 12 in x 7 in |
| Prop 65 | WARNING: Cancer & Reproductive Harm — www.P65Warnings.ca.gov |
