InjectorDynamics 1050.48.11.WRX.4 ID1050x Fuel Injectors for Subaru WRX/STI

Vehicle Fitment

• 2002-2014 Subaru WRX (EJ25 / EJ20 Gen engines)
• 2007-2020 Subaru WRX STI (EJ25 / EJ20 Gen engines)
• 2007-2011 Subaru Legacy GT / Forester XT (EJ25 with top-feed rail)
• Fitment confirmed through 2024; 2025 coverage unconfirmed at time of listing.

Features

• Designed as motorsport-grade fuel injectors - not modified OEM parts.
• Improved internal flow for increased output over older injector designs.
• Corrosion-resistant internals compatible with gasoline and ethanol blends.
• Short-body form factor fits many Subaru top-feed fuel rails.
• Replaceable inlet filters for longer service life.
• USCAR electrical connector for reliable wiring interface.
• Stable operation at higher fuel pressures (up to ~10 bar / 145 psi).
• Matched set of 4 for consistent cylinder fueling.

Specifications

• Part Number: 1050.48.11.WRX.4 - InjectorDynamics ID1050x
• Nominal Flow Rate: ~1065 cc/min @ 3.0 bar (~43.5 psi)
• Maximum Differential Fuel Pressure: ~10 bar (145 psi)
• Injector Length: ~48 mm seat-to-seat (short body)
• O-Ring Sizes: Upper 14 mm, Lower ~? (application specific)
• Electrical Connector: USCAR style
• Compatible Fuels: Gasoline and common ethanol blends
• Quantity: Set of 4 injectors

Included Components

• 4x InjectorDynamics ID1050x Fuel Injectors (PN 1050.48.11.WRX.4)

Product Description

The InjectorDynamics ID1050x Fuel Injector Set (part number 1050.48.11.WRX.4) is a high-performance upgrade engineered for Subaru WRX and WRX STI engines, as well as other top-feed EJ-series turbocharged applications. These injectors are motorsport-grade components designed from the ground up to provide consistent, optimized fuel delivery across the operating range - whereas many stock or re-pinned injectors are adapted from OEM parts.

With a nominal flow rate of approximately 1065 cc/min and compatibility with gasoline and common ethanol blends, this set of four injectors supports turbocharged performance builds needing increased fueling capacity. The compact short-body design and USCAR electrical connections allow fitment on compatible Subaru models with appropriate fuel rails and wiring. Always verify specific engine variant, model year, and tuning requirements before installation. Fitment confirmed through 2024; 2025 coverage unconfirmed at time of listing.