Product Description
Restore crisp fueling and add headroom for mild performance with the INDUSTRIAL INJECTION AP63803ADR3 remanufactured AD-code injector for the 7.3L Power Stroke. This R3 build flows 160cc and is calibrated for clean, reliable street power when paired with proper tuning and fuel system health.
Fitment
- 1999.5–2003 Ford F-250 / F-350 / F-450 / F-550, Excursion — 7.3L Power Stroke (AD code)
- Fits engines built after 12/07/1998 that use AD-code split-shot injectors.
What’s Included
- (1) Remanufactured AD-code HEUI injector — R3 / 160cc
- Pre-installed external O-rings & nozzle washer (inspect/replace as needed during install)
- Core return required (see product page for core terms)
Why Choose This Injector
- 160cc flow (R3) — great streetable upgrade over stock while maintaining drivability
- OE-quality reman components and test calibration
- Direct fit for AD-code 7.3L applications
Recommended Parts (CPP Internal Links)
- MAHLE GS33440 Injector Seal/O-Ring Kit (1994–2003 7.3L)
- Bostech GK02808K Valve Cover Gasket & UVCH Kit (1999–2003)
- DTech DT730020 Glow Plugs (set/each)
- Bostech BTS021130 ICP Sensor (1994–2003)
- Dorman 800-898 Fuel Return Line (2000–2003)
- Bostech HPOP008X-K1 Reman HPOP w/ IPR (1999–2003)
Cross-Reference / Alternatives
Helpful Notes
- Always verify injector code (AD) and build date before ordering.
- Healthy HPOP pressure, ICP/IEP sensors, fuel filter, and UVCH connections are critical for proper HEUI function.
- Core returns must be the same style injector to receive full credit.
FAQ
Is tuning required for 160cc injectors?Not strictly required, but custom or box tuning is recommended to optimize pulse width and idle quality with 160cc flow.
Will these work on early 1999 trucks?No. Early-’99 trucks (pre-12/07/1998 build) typically use AA/AB/AC injectors. These AD-code units fit 1999.5–2003 builds.
Do I need new valve cover gaskets and UVCH?We strongly recommend replacing brittle gaskets/harnesses during injector service to avoid intermittent misfires and connection issues.
What else should I replace during install?At minimum: injector O-rings, fuel filter, check ICP health, and inspect the fuel return lines. See the recommended parts list above for CPP-stocked options.
