AIRDOG A4SPBD153 FP-100-4G AIR/FUEL SEPARATION SYSTEM WITH IN-TANK FUEL PUMP FOR 98.5–04 CUMMINS 5.9L 24V

Product Description

Airdog A4SPBD153 FP-100-4G is a 100 GPH original AirDog system engineered for 1998.5–2004 Dodge Ram Cummins 5.9L 24-valve trucks with the factory in-tank fuel pump. It frame-mounts using the supplied sandwich-plate bracket, draws via a 1/2" draw straw to bypass the OE pump, feeds clean, de-aerated fuel to the VP44 (’98.5–’02) or early CP3 (’03–’04), and routes air/vapor back to the tank through a filler-neck tee for steadier pressure and improved pump life.

Vehicle Fitment

• 1998.5, 1999, 2000, 2001, 2002 Dodge/Ram 2500 & 3500 — Cummins 5.9L 24V (VP44, with in-tank pump)
• 2003, 2004 Dodge/Ram 2500 & 3500 — Cummins 5.9L 24V (early CP3, with in-tank pump)

Key Features

• 100 GPH supply for stock–moderate power levels
• De-aerates fuel; returns air/vapor to tank
• Bypasses factory filter housing for consistent supply to VP44/CP3
• Complete kit with bracketry, plumbing, wiring, filters

What’s Included

Complete FP-100-4G system, frame-rail bracket and cradle, 1/2" draw straw, filler-neck tee, lines/fittings, filters, wiring harness, and hardware (see install manual for the full parts list).

Cross-Reference / Related Airdog Products (CPP Diesel)

• AIRDOG A4SPBD101 FP-100-4G — WITHOUT in-tank fuel pump (’98.5–’04 24V)
• AIRDOG A4SPBD104 FP-150-4G — higher flow option (’98.5–’04 24V)
• AIRDOG A7SPBD354 II-5G DF-100-5G — 5G upgrade WITH in-tank pump (’98.5–’04 24V)
• AIRDOG A7SPBD253 II-5G DF-100-5G — 5G upgrade WITHOUT in-tank pump (’98.5–’04 24V)
• AIRDOG A4SPBD102 FP-100-4G — 04.5–18 Cummins 5.9L/6.7L 24V

Installation Instructions

• Airdog Resource Library (latest manuals)
• FP-100/FP-150 1998.5–2004 Cummins (Rev 1-10-24) – PDF

FAQs

Is the FP-100-4G enough for mild injectors and a small turbo on my 24V?

Yes—100 GPH supports typical street builds on VP44 and early CP3 trucks. For higher demand, step up to the FP-150-4G (A4SPBD104) or a 5G system.

Does this bypass the factory fuel filter housing and lift pump?

Correct. The AirDog feeds the VP44/CP3 directly and returns air/vapor to the tank via the filler-neck tee for stable pressure.

Do I need to drop the tank?

No tank drop for mounting. The kit uses a 1/2" draw straw to bypass the OE module and mounts to the frame rail with the included bracket.

What pressure does the original AirDog run on these trucks?

Typical operating pressure is ~15–17 PSI on this application per the install manual.

Specifications for airdog A4SPBD153