The Alliant Power AP0003 is a new IPR valve seal o-ring kit for 1994–2003 Ford 7.3L Powerstroke applications.

Features & Benefits

• New Alliant Power IPR Valve Seal O-Ring Kit (Alliant P/N AP0003)
• Fit, form, and function tested to meet or exceed original-equipment standards (per Alliant Power)
• Direct replacement for 4C3Z-9C977-AA / F6TZ-9C977-AN / F6TZ-9C977-AO
• Backed by Alliant Power’s 24-month, unlimited-mileage warranty

Application

• Ford F-250 (1994–1996)
• Ford F-350 (1994–1997)
• Ford F-250 HD (1997)
• Ford E-350 Super Duty / F-250 Super Duty / F-350 Super Duty / F-450 Super Duty / F-550 Super Duty (1999–2003)
• Ford E-350 Econoline Club Wagon (1994–2002)
• Ford E-350 Econoline (1994–1998)
• Ford E-450 Econoline Super Duty (1999–2002)
• Ford F-650 / F-750 / Excursion (2000–2003)
• Alliant Power lists additional vehicle applications for this part number

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

Cross-Reference / Replaces

• Ford: 4C3Z-9C977-AA, F6TZ-9C977-AN, F6TZ-9C977-AO, F6TZ-9C977-AA
• Motorcraft: CG-751
• Navistar: 1825806, 1825806C91, 1825806C92, 1825806C
• Delphi: HTK100
• Alliant Power: AP0003

Warranty: Alliant Power’s standard warranty: 24 months with unlimited miles/hours on installed parts (Alliant Power warranty policy, rev. Aug 2025).