1997-1999 Powerstroke AB Hybrid Single Shot, Stage 4, 285CC Injector (AP63801ABR4)

Description

Industrial Injection AB Hybrid Single Shot Stage 4 285cc injector for 1997-1999 Ford 7.3L Powerstroke F-Series and 1997-1998 E-Series. A 150%-over performance injector built on the pre-split-shot AB body — designed for high-performance race builds on engines built before 12/07/1998 (Prime Split Shot architecture).

The Stage 4 285cc fuel volume is a serious step up from the Stage 3 230cc and requires supporting upgrades to be useful — HPOP, turbo, tuning, and fueling support all need to be in place. This is not a daily-driver injector; it's a competition-tier fueling step.

Features

• AB Hybrid Single Shot Stage 4 Injector
• 285cc Fuel Volume — 150% Over Stock
• Designed for High-Performance Race Builds
• OEM Cross-References: F81Z9E527BRM, F7TZ9E527BRM, F61Z9VE527BRM
• 1-Year Limited Warranty
• For 1997-1999 Ford 7.3L Powerstroke (F-Series and 1997-1998 E-Series)
• Part Number: AP63801ABR4

Notes

• Prime Split Shot architecture — for engines built BEFORE 12/07/1998 ONLY. Engines built after this date use the AB Split Shot platform with a different injector.
• Competition-use only. Not legal for on-road, off-road, or dual-use applications — dedicated competition use only. Emissions compliance is the consumer's responsibility.
• HPOP and supporting fueling upgrades required at this stage.
• Core deposit applies — keep your old injectors and return them to recover the deposit.