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Product Fitment:
2002-2014 Subaru WRX
2007-2021 Subaru STI
Upgrade your fuel system with Nostrum 1000cc Twin Spray PFI Injectors, engineered specifically for Subaru EJ-series engines. Delivering a massive 66% increase in fuel flow over stock injectors, this direct-fit solution is ideal for turbo upgrades, ethanol fuels, and high-horsepower builds. Designed with application-specific spray targeting and OEM-style fitment, these injectors improve performance while maintaining smooth drivability and engine safety.
These injectors feature a twin spray split-gamma pattern with a custom bend angle tailored for EJ cylinder heads. This side-specific targeting mirrors factory spray geometry to ensure optimal atomization and combustion, helping reduce common aftermarket injector issues like rough idle, knock, or fuel dilution.
Flow Rate: 1000cc/min
Increase Over Stock: +66% vs OEM 565cc injectors
Fuel Compatibility: Fully compatible with E85 and high-ethanol blends
Direct OEM replacement design — no adapters required
Precision-machined internals with OEM-grade seals
Color-coded bodies for correct cylinder placement
Ethanol-resistant construction for long service life
Limited lifetime warranty for confidence
Designed for a wide range of Subaru EJ platforms:
2002–2014 WRX
2004–2005 STI (top-feed conversion required)
2006–2021 STI
2004–2013 Forester XT (early models require conversion)
2005–2009 Legacy GT / Outback XT (top-feed conversion required)
2005–2006 Saab 9-2X Aero
Full set of Nostrum 1000cc injectors
OEM-quality seals & O-rings
Color-coded installation markings
Detailed install guide
Tuning guide compatible with platforms such as COBB Tuning systems
Installation mirrors factory injector replacement and typically requires only basic tools. While experienced enthusiasts can perform the upgrade, professional installation is recommended if you’re unfamiliar with fuel system service. Custom tuning is required to ensure safe operation and maximize performance gains.
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