7.3L Powerstroke New AD Injectors Alliant AP63803

This is a set of 8 new Alliant Power fuel injectors for 1999–2003 Ford 7.3L Powerstroke applications: seven AD injectors (Alliant AP63803AD) and one AE injector (Alliant AP63804AE), per Full Force Diesel’s set configuration. Alliant’s fuel injector delivers the precise fuel quantity and spray pattern required for efficient combustion and proper engine operation.

Features & Benefits

• New Alliant Power Set of 8 New Fuel Injectors (7 AD + 1 AE) (Alliant P/N AP63803AD)
• Fit, form, and function tested to meet or exceed original-equipment standards (per Alliant Power)
• Direct replacement for 5C3Z-9VE527-BRM / F81Z-9E527-CRM / 5C3Z9VE527
• Backed by Alliant Power’s 36-month, unlimited-mileage warranty

Included in the Box

• 7x New AD Fuel Injectors (Alliant AP63803AD)
• 1x New AE Fuel Injector (Alliant AP63804AE)
• Each injector supplied with O-rings installed (per Alliant)

Application

• Ford F-250 Super Duty (1999–2003)
• Ford Excursion (2000–2003)
• Ford E-350 Super Duty (2001–2003)
• Ford E-350 Econoline Club Wagon (2001–2002)
• Ford E-350 Club Wagon (2003)

Always verify fitment against your VIN, engine, and OE part number before ordering.

Cross-Reference / Replaces

• Ford: 5C3Z9VE527, 5C3Z-9VE527-BRM, 74HM2U1656343, F81Z9E527, F81Z-9E527-CRM, 5C3Z9E527BRM, SC3Z9V527ARM, F81Z9E527CRMR
• Motorcraft: CMR8RM
• Navistar: 1823751, 1823751C91, 1823751RX91, 1831487, 1831487C92, 1831487C93, 1831488, 1831488C1, 1831489, 1831489C1
• Delphi: EX63803, EX63803AD
• Alliant Power: AP63803AD

Warranty: Alliant Power’s published warranty policy (rev. Aug 2025) covers new fuel injectors for 36 months with unlimited miles, parts & labor.

A refundable core charge is added at checkout and refunded when your old injectors are returned per our core terms.