Injector Dynamics 1750.48.11.WRX.4 ID1750-XDS 1728cc Top-Feed Injectors Subaru

Vehicle Fitment

• 2002-2014 Subaru WRX (EJ20 Turbo 2.0L, EJ25 Turbo 2.5L - Top-Feed Rail)
• 2007-2021 Subaru WRX STI (EJ25 Turbo 2.5L - Top-Feed Rail)
• 2007-2013 Subaru Forester XT (EJ25 Turbo 2.5L - Top-Feed Rail)
• 2007-2013 Subaru Legacy GT (EJ25 Turbo 2.5L - Top-Feed Rail)

Fitment Notes

• Fits OEM and aftermarket top-feed fuel rails using 11mm (red) top O-ring - included in this kit.
• 2004-2007 USDM STI uses OEM side-feed rails. To use these injectors, you must either swap to OEM WRX top-feed rails or use Injector Dynamics billet fuel rails (sold separately).
• WRX-16B bottom adapters are included for correct bottom O-ring fitment on Subaru applications.
• Electrical connector is USCAR - includes clips and pins for re-pinning factory Denso connector. A pre-wired USCAR to Denso adapter is available separately for plug-and-play installation.
• Professional tuning required after installation. Injector Dynamics provides accurate injector characterization data for all major EMS platforms.
• Recommended power range: 550-850 WHP on gasoline or E85.

Features

• Successor to the ID1700/ID1700-XDS - higher dynamic flow rate with no increase in minimum fuel mass, delivering improved idle and cruise behavior at high flow capacities.
• Better cylinder-to-cylinder balance at low pulse widths for improved drivability and tuning predictability, especially on E85.
• Full stainless steel internals - compatible with methanol, ethanol, E85, MTBE, nitromethane, and all known hydrocarbon fuels, including extended storage with corrosive fuels.
• Improved pressure sensitivity over the ID1700 for more stable and consistent operation across varying fuel rail pressures up to 7.0 bar (101.5 psi).
• High impedance (saturated) solenoid - compatible with all standard ECUs without the need for a resistor box or peak-and-hold driver.
• Flow matched as a set for optimized cylinder-to-cylinder consistency.

Specifications

• Injector Model: ID1750-XDS
• Nominal Flow Rate: 1728cc/min @ 3.0 Bar (43.5 psi), E10 fuel at 49°C (120°F)
• Maximum Differential Fuel Pressure: 7.0 Bar (101.5 psi)
• Fuel Compatibility: Methanol, Ethanol, E85, MTBE, Nitromethane, All Hydrocarbon Fuels
• Electrical Connector: USCAR (EV6)
• Injector Length: 48mm
• Top O-Ring Size: 11mm (Red Adapter)
• Bottom Adapter: WRX-16B
• Injector Type: Top-Feed, High Impedance (Saturated)
• Quantity: Set of 4, Flow Matched

Included Components

• 4x ID1750-XDS Fuel Injectors (Flow Matched Set)
• 4x 11mm Red Top Adapters
• 4x WRX-16B Bottom Adapters
• Clips and Pins (for USCAR connector re-pinning)

Product Description

The Injector Dynamics ID1750-XDS (Part# 1750.48.11.WRX.4) is the direct successor to the highly regarded ID1700, purpose-built for EJ20 and EJ25-powered Subaru WRX and STI platforms targeting 550-850 WHP on pump gas or E85. The XDS series brings meaningful improvements over its predecessor: higher dynamic flow rate without raising minimum fuel mass, better cylinder-to-cylinder balance at low pulse widths, and improved pressure sensitivity - all while retaining the full stainless steel internals that make it compatible with every fuel type on the market including methanol, ethanol, and E85 for extended periods.

This WRX-specific configuration includes 11mm red top adapters and WRX-16B bottom adapters for direct fitment to OEM and aftermarket top-feed fuel rails. The USCAR electrical connector requires either re-pinning the factory Denso connector using the included clips and pins, or adding the optional USCAR-to-Denso adapter for true plug-and-play installation. Note that 2004-2007 USDM STI owners will need to swap to top-feed rails before installing this injector set. As with all Injector Dynamics products, complete and accurate characterization data is available for all major ECU platforms to ensure precise and repeatable tuning results.