Product Description
Upgrade your 24-valve Cummins fuel supply with the AirDog II-5G DF-100 (A7SPBD253). This 100 GPH demand-flow lift pump is engineered for 1998.5–2004 Dodge Ram 2500/3500 5.9L Cummins trucks without the in-tank fuel pump. It mounts to the frame using the included sandwich-plate system, pulls fuel through a water separator, pressurizes via a gerotor pump, filters to 2 microns, and returns de-aerated fuel back to the tank for smooth, consistent pressure at the injection pump.
- 100 GPH system optimized for stock to mildly upgraded fueling
- Demand-flow design reduces heat, noise, and wear
- 2-micron post-pump filtration + water separation
- Air/Vapor return to tank for stable pressure and cleaner fuel
- Direct feed to injection pump; bypasses factory filter housing/block pump
- Complete kit with bracketry, fittings, fuel line, harness, and hardware
Vehicle Fitment
- Dodge Ram 2500/3500 5.9L Cummins 24V (1998.5–2004)
- 1998.5–2002 VP44 trucks (no in-tank pump)
- 2003–2004 early CP3 trucks (no in-tank pump)
- Excludes trucks converted to or factory-equipped with an in-tank lift pump
Cross-Reference / Alternatives (AirDog Only)
- A7SPBD354 (DF-100) – 1998.5–2004 Cummins WITH in-tank pump
- A7SABD525 (DF-165) – 1998.5–2004 Cummins
- A7SABD528 (DF-220) – 1998.5–2004 Cummins
- A7SPBD254 (DF-100) – 2004.5–2018 Cummins 5.9L/6.7L
- A7SPBD338 (DF-100) – 1989–1993 Cummins 5.9L 12V
Installation Instructions
Download the official AirDog II-5G DF-100 (1998.5–2004 Cummins, without in-tank pump) install manual: AirDog #13 DF-100-5G (1998.5–2004 Cummins) Installation PDF
Specifications for airdog A7SPBD253
| Attribute | Value |
|---|---|
| Brand / Series | AirDog II-5G |
| Part Number | A7SPBD253 |
| Flow Rate | 100 GPH (DF-100) |
| UPC | 813094015535 |
| GTIN | 813094015535 (GTIN-12) |
| Shipping | Free Shipping (continental U.S.) |
| Ship Weight | ≈ 27 lb |
| Package Dimensions (W × H × D) | 13.5" × 7.0" × 13.0" |
| Country of Origin | USA |
| Prop 65 Warning | This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. www.P65Warnings.ca.gov |
FAQ
Will this work on my 1998.5–2004 truck if it has an in-tank lift pump?
No. This A7SPBD253 kit is for trucks without the in-tank pump. If you have the in-tank pump, use the A7SPBD354 instead.
How much power will the DF-100 support?
The DF-100 flows 100 GPH and is ideal for stock to moderately tuned builds where a stable 15–17 psi feed pressure is desired at the injection pump.
What filters does it use and how often should I service them?
It includes a water separator (pre-pump) and a 2-micron fuel filter (post-pump). Inspect every oil change and replace based on fuel quality and restriction.
Does this bypass the factory filter housing and block-mounted pump?
Yes. The pressure side feeds the injection pump directly while the system returns separated air/vapor to the tank through the filler neck tee.
Is drilling the frame required?
No. The included sandwich-plate mount secures the bracket to the frame for a clean, reversible install.
