IAG Performance and Nostrum have joined forces to develop the IAG Spec High-Flow Direct Fuel Injector Set by Nostrum, a direct-fit fuel injector upgrade for 2022+ WRX, 2019+ Ascent, 2020+ Legacy XT Sport, and 2020+ Outback XT & Wilderness Subaru models equipped with the FA24 2.4L engine. These injectors are engineered to increase fuel flow while maintaining an OEM-quality spray pattern, ensuring proper atomization and an ideal air-fuel mixture for improved performance and drivability.
The IAG Spec High-Flow Direct Fuel Injector Set delivers up to 24% more fuel flow than stock Subaru injectors without compromising cold starts, idle quality, or throttle response. This increase in fueling capacity makes them an excellent upgrade for higher-boost or performance-oriented setups. For maximum fueling capability, these injectors can be paired with the IAG Spec High-Pressure Fuel Pump by Nostrum for 2022+ Subaru WRX, which offers a 37% increase in flow over the factory pump and unlocks additional horsepower potential.
These injectors are fully compatible with E85 and blended ethanol fuels. E85 provides several advantages over pump gasoline, including increased horsepower potential, cooler and cleaner combustion, and improved resistance to detonation. When properly tuned and used with E85-compatible fuel system components, the injectors deliver consistent and reliable fuel supply capable of meeting the demands of ethanol-based fuels.
Designed as a true direct replacement, the IAG Spec High-Flow Direct Fuel Injector Set installs just like the factory injectors. Nostrum’s precise manufacturing ensures proper fitment, and all necessary fittings and hardware are included for a straightforward installation with basic hand tools and no vehicle modifications required.
Tuning is required after installation to ensure optimal performance and reliability. The injectors are compatible with the stock Subaru ECU and can be calibrated using COBB engine management devices for refined control and improved results. A list of Nostrum Certified Tuners is available for reference. The high-pressure fuel pump is sold separately.
Specs:
WHP potential on gasoline: 600 WHP (Calculated based on 290 BSFC, 40% injector DC, 10% driveline loss & 20 MPa fuel pressure)
WHP potential on E85: 480 WHP (Calculated based on 360 BSFC, 40% injector DC, 10% driveline loss & 20 MPa fuel pressure)
Tune Requirement: Yes
Recommended Tuning Suite: COBB (WRX, Legacy, Outback, and Ascent – WRX only 2022+)
Flow rate increase over Stock: 24% (compared to stock flow of 14.146 g/s)
Flow rate: 17.5 g/s at 100 bar
Max Operating Pressure: 200 bar / 20 MPa / 2900 psi
