
1994-1997 Powerstroke AA Stage 5 400cc W/Oil Mods (AP63800AAR5)
Description
Stage 5 400cc Industrial Injection AA-series HEUI injector for 1994-1997 Ford F-250 and F-350 trucks running the 7.3L Powerstroke. Built for serious power — 400cc flow rate combined with oil-circuit modifications that address the lubrication failures Stage 5+ Powerstrokes are prone to when run on the factory oil system.
The 400cc fuel volume is well beyond stock and well beyond what a stock HPOP can keep up with on its own. The oil-circuit modifications are what make this injector different from a generic Stage 5 — they target the specific lubrication-related failures that show up at this fueling level. This is a race-grade injector for built engines, not a daily-driver part.
Features
- AA-Series Stage 5 HEUI Injector
- 400cc Fuel Flow Capacity
- Oil-Circuit Modifications to Prevent Lubrication-Related Failures
- Engineered for Maximum-Horsepower Applications
- For 1994-1997 Ford 7.3L Powerstroke F-250/F-350
- Part Number: AP63800AAR5
Notes
- Stock HPOP is the limiting factor on 400cc injectors — plan to upgrade the HPOP if not already done.
- Core deposit applies — keep your old injectors and return them to recover the deposit.
Original: $371.14
-65%$371.14
$129.90Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
Description
Stage 5 400cc Industrial Injection AA-series HEUI injector for 1994-1997 Ford F-250 and F-350 trucks running the 7.3L Powerstroke. Built for serious power — 400cc flow rate combined with oil-circuit modifications that address the lubrication failures Stage 5+ Powerstrokes are prone to when run on the factory oil system.
The 400cc fuel volume is well beyond stock and well beyond what a stock HPOP can keep up with on its own. The oil-circuit modifications are what make this injector different from a generic Stage 5 — they target the specific lubrication-related failures that show up at this fueling level. This is a race-grade injector for built engines, not a daily-driver part.
Features
- AA-Series Stage 5 HEUI Injector
- 400cc Fuel Flow Capacity
- Oil-Circuit Modifications to Prevent Lubrication-Related Failures
- Engineered for Maximum-Horsepower Applications
- For 1994-1997 Ford 7.3L Powerstroke F-250/F-350
- Part Number: AP63800AAR5
Notes
- Stock HPOP is the limiting factor on 400cc injectors — plan to upgrade the HPOP if not already done.
- Core deposit applies — keep your old injectors and return them to recover the deposit.













