Home » Injector Dynamics ID1050-XDS Top-Feed Conversion Kit with Dual Billet Fuel Rails for 2004–2006 Subaru STI (Set of 4)
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Important emissions notice This product is not identified as CARB exempt. Verify legality for your specific vehicle and location before purchasing or installing. Parts that bypass, defeat, or render emissions controls inoperative must not be used on pollution-controlled vehicles. A “competition use only” label does not by itself make a prohibited defeat device legal under federal law. California street applications generally require a valid CARB Executive Order for the specific part and vehicle.
Injector Dynamics

Injector Dynamics ID1050-XDS Top-Feed Conversion Kit with Dual Billet Fuel Rails for 2004–2006 Subaru STI (Set of 4)

SKU: IDX1050.18.01.48.14.4
$820.05
Product details

This Injector Dynamics top-feed conversion kit, manufacturer part number 1050.18.01.48.14.4, is listed specifically for the 2004–2006 Subaru STI. It converts the factory side-feed arrangement to top-feed port fuel injection (PFI). The kit includes four ID1050-XDS injectors, dual billet fuel rails, and two sets of 2x8 lower O-rings. This is a different configuration from the 2007+ STI application.

Specifications

  • Nominal flow rate: 1065 cc/min at 3.0 bar (43.5 psi), rated with gasoline at 52°C (125°F)
  • Maximum differential fuel pressure: 10.0 bar (145.0 psi)
  • Injector body length: 48 mm
  • Upper O-ring: 14 mm
  • Injection architecture: top-feed port fuel injection (PFI) conversion
  • Electrical: high impedance; USCAR connector; new mating connector supplied by Injector Dynamics
  • Fuel compatibility per Injector Dynamics: compatible with all known fuels

Included in This Kit

  • Four (4) ID1050-XDS injectors
  • Dual billet fuel rails
  • Two sets of 2x8 lower O-rings

Fitment

Listed by Injector Dynamics under part number 1050.18.01.48.14.4 for the 2004–2006 Subaru STI side-feed-to-top-feed conversion. Verify compatibility using the exact manufacturer part number before ordering.

Additional Plumbing Required

The separate conversion line/plumbing kit is not included in this SKU. Injector Dynamics documents the AN lines, fittings, hose, clamps, series rail plumbing, and relocation of the factory fuel-pressure regulator required for the conversion. Confirm all required plumbing components before installation.

Installation & Calibration

Professional installation and an application-appropriate ECU calibration using Injector Dynamics characterization data are required.

Check applicable federal, state, and local emissions regulations before installing this part on a street-driven vehicle.