Cobb Subaru Top Feed 1050X Fuel Injectors

Part Details:

The COBB Subaru Top Feed 1050X Fuel Injectors are designed to provide increased fueling capacity and precise fuel control for performance-oriented Subaru builds. Engineered to support higher horsepower applications, these injectors are an ideal upgrade for vehicles running upgraded turbo systems, flex fuel, or advanced tuning strategies.

Featuring a top-feed design and high-quality internal components, the 1050X injectors deliver consistent fuel atomization and reliable performance across a wide range of operating conditions. This makes them well suited for both aggressive street builds and track-focused applications where fueling accuracy is critical.

Fueling Capacity for Performance Builds

As power demands increase, factory injectors can become a limiting factor. The COBB 1050X fuel injectors provide the additional fuel flow required to safely support higher boost levels while maintaining stable air-fuel ratios. They are commonly paired with upgraded fuel rails and fuel system components to ensure consistent delivery under load.

Compatibility & Tuning

These injectors are designed for Subaru applications using top-feed fuel systems and integrate seamlessly with other COBB fueling components. Professional ECU tuning is required after installation to properly calibrate injector scaling and ensure optimal engine performance.

Key Features

• Top feed fuel injectors for Subaru performance applications
• 1050cc flow rate to support increased horsepower and boost
• Consistent fuel atomization for stable air-fuel ratios
• Designed for use with upgraded fuel systems and flex fuel setups
• Compatible with COBB fuel rails and Accessport-based tuning
• Ideal for street and track-focused performance builds

What’s Included

• Set of COBB Top Feed 1050X fuel injectors
• Required seals and installation components

Frequently Asked Questions

What power level are the 1050X injectors suitable for?
The 1050X injectors are well suited for moderate to high-horsepower Subaru builds, including setups running upgraded turbochargers and ethanol blends.

Do these injectors support flex fuel?
Yes. These injectors are commonly used in flex fuel applications when paired with the appropriate fuel system upgrades and tuning.

Is tuning required after installation?
Yes. ECU tuning is required to properly scale the injectors and ensure safe and reliable engine operation.

Recommended Supporting Fuel Components

• Fuel Pumps – higher-flow injectors require increased fuel volume to maintain consistent fueling at higher power levels.
• Fuel Pressure Regulators – help maintain stable fuel pressure when running larger injectors and upgraded fuel systems.
• Fuel Rails – support balanced fuel distribution and compatibility with high-flow injectors.
• Fuel Delivery Components – explore complete fuel system upgrades designed to work together.

Learn more about COBB Tuning performance solutions and supporting components