Legacy GT & Forester XT | ID1050-XDS | Injector Dynamics | 1050.48.11.WRX.4
ID1050-XDS, for Legacy GT & Forester XT / Turbo 2.0L & 2.5L. WRX-16B bottom adapters. 11mm (red) adapters
The ID1050-XDS is the evolution of the ID1050x.
The ID1050-XDS benefits from Dual Slope Matching, a method of matching the flow rate in both the linear, and nonlinear operating range, providing better cylinder to cylinder consistency at low pulse widths.
Corrosion resistant internals make it compatible with all known fuels, capable of extended service life with corrosive fuels.
Compact body allows fitment in 200+ applications, including current and future engines utilizing short body injectors.
Stronger magnetic circuit offers stable operation up to 10 bar.
Replaceable inlet filter extends service life.
Base Specifications
Nominal Flow Rate – 1065cc/min @ 3.0 Bar (43.5 psi) Using Gasoline at 52 Degrees C (125 Degrees F)
Maximum Differential Fuel Pressure – 10.0 Bar (145.0 psi)
Fuel Compatibility – Compatible With All Known Fuels
Electrical Connector – USCAR
Details
Frequently Asked Questions About the Legacy GT & Forester XT ID1050-XDS Injectors
How much horsepower can the ID1050-XDS support on a Legacy GT or Forester XT running E85?
The ID1050-XDS flows roughly 1065 cc/min at 43.5 psi, providing enough fuel for most EJ255 and EJ257 builds to reach around 450–550+ wheel horsepower on E85. Actual results depend on turbo size, fuel pump capacity, and overall engine setup.
Is the 1050.48.11.WRX.4 injector a direct-fit for the Legacy GT and Forester XT intake manifold?
Yes. This version uses a 48mm body length and 11mm Subaru-style O-rings, matching the factory spacing and sealing profile for EJ-series turbo engines. This ensures a true drop-in physical fit.
Do these ID1050-XDS injectors plug directly into the Legacy GT and Forester XT factory wiring harness?
Yes. This injector set comes equipped with the correct Subaru-style electrical connector used on the stock harness, so installation is plug-and-play without adapters.
Where can my tuner find accurate calibration data for the ID1050-XDS when tuning an EJ engine with Cobb or open-source software?
Injector Dynamics provides complete characterization data, including Latency, Flow vs. Pressure, and Short Pulse Adder tables. These values are available directly from Injector Dynamics and integrate seamlessly into Cobb Accessport and open-source Subaru tuning platforms.
How does the ID1050-XDS improve idle and cruising behavior on modified Subaru turbo engines?
Thanks to its highly precise Dual Slope Matching, the ID1050-XDS maintains exceptional accuracy at very low pulse widths. This ensures smooth idle, crisp throttle response, and stable low-load fueling even on EJ engines with upgraded turbos or aggressive cams.
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