Injector Dynamics ID1050-XDS Fuel Injectors | Set of 4 | 2004-2006 Subaru Impreza WRX STi (1050.18.01.48.14.4)

Mismatched injectors make every cylinder run its own tune.

Once boost and ethanol enter the picture, factory injectors become the first hard ceiling in the whole combination. The ID1050-XDS (the current evolution of the ID1050x) answers that with 1065cc/min of flow at 3.0 bar, compatibility with all known fuels including E85, delivered as a matched set of 4 for your 2004-2006 Subaru Impreza WRX STi. Each set is flow matched using Dual Slope Matching and backed by full characterization data, so your ECU gets real numbers, not estimates. Sized right, characterized right, tuned right.

What You'll Feel

• Headroom to grow the build without touching the fuel system again
• Cylinder-to-cylinder consistency you can see in your lambda and EGT logs
• Faster dyno sessions, because accurate injector data means less time chasing fuel trims
• Stock-like idle and clean cold starts, even at this injector size
• Confidence to run ethanol daily without worrying what it is doing to your injectors

Features

• Nominal flow rate: 1065cc/min at 3.0 bar (43.5 psi), measured with gasoline at 52 degrees C
• Maximum differential fuel pressure: 10.0 bar (145.0 psi)
• Compatible with all known fuels, including gasoline, E85, and ethanol blends
• USCAR electrical connector
• Supplied as a flow-matched set with Dual Slope Matching for consistent delivery at low pulse widths
• Corrosion resistant internals for extended service life on ethanol and other corrosive fuels

The Details

The ID1050-XDS is the current evolution of the ID1050x, built to spec with Bosch Motorsport rather than modified from a production part. Dual Slope Matching matches flow in both the linear and nonlinear range, so cylinder-to-cylinder delivery stays consistent even at the short pulse widths where big injectors usually get ugly. Every set ships flow matched, and Injector Dynamics publishes full characterization data, including slope, offset (dead time) versus voltage and pressure, and short pulse width behavior, so your tuner can load real numbers instead of chasing fuel trims across the map. Accurate dead times are what make large injectors behave at idle and cruise, and they are the reason these tune quickly and stay tuned.

Kit Includes

• (4) 1050cc Injectors
• (2) Billet Fuel Rails
• (2) 2x8 Lower O-Rings

Applications

• 2004-2006 Subaru Impreza WRX STi (Top Feed)