7.3L Powerstroke HEUI Injector (AD) | Alliant Power AP63803AD New, 1999.5–2003
OE-new AD-code HEUI injector for late 7.3L Powerstrokes — the standard injector for cylinders 1 through 7 on 1999.5–2003 Super Dutys. New units mean matched flow across the set and no rebuilt-solenoid roulette on a high-mile workhorse.
| Part number | AP63803AD |
| Brand | Alliant Power |
| Condition | New (OE new, not reman) |
| Application | 1999.5–2003 Ford 7.3L Powerstroke — standard AD injector, cylinders 1–7 |
| Warranty | Factory warranty applies; confirmed with your quote |
| Core charge | Refundable $100 core (returned for full refund on your rebuildable core) |
Fits / Applications
- 1999.5–2003 Ford F-250/F-350/F-450/F-550 Super Duty 7.3L Powerstroke
- Excursion 7.3L; pairs with one AE long-lead in cylinder 8 on these trucks
Cross Reference: Part Numbers This Covers
AD code · HEUI
Why Buy From Valley Fuel Injection
We are a diesel fuel-injection and turbocharger shop in Woodland, CA — rebuilding pumps, injectors and turbos on our own benches since 1993 — not a drop-ship storefront. When you call, you talk to the people who test these units. We verify fitment against your engine serial number before anything ships, so the right part arrives the first time.
Doing all eight? Cylinder 8 takes the AE long-lead on these trucks — we stock that too and will quote the full set.
Ready to order online and ships free ground in the lower 48 states. A refundable $100 core deposit is added at checkout and refunded in full when we receive your rebuildable core. Questions on fitment? Call 530-668-0818.
Pricing covers the unit itself. Any applicable sales tax and the refundable core charge are additional; ground shipping in the lower 48 is free. Buying tax-exempt? Qualifying diesel repair shops, fleets, farms, and agricultural operations can purchase tax-free. Set up tax-exempt purchasing once and every qualifying order is tax-free going forward.
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