Cobb Subaru Top Feed 1300X2 Fuel Injectors

Part Details:

The COBB Subaru Top Feed 1300X2 Fuel Injectors are designed to provide high-capacity, reliable fueling for modified Subaru applications running increased boost or alternative fuels. With a higher flow rate than smaller injector options, these injectors are well suited for builds that require consistent fuel delivery to support advanced tuning and higher power levels.

Featuring a top-feed design and precision flow characteristics, the 1300X2 injectors help maintain stable air-fuel ratios under load while preserving drivability when properly calibrated. They are commonly used in performance-focused WRX and STI setups where upgraded fueling is essential for safe and efficient operation.

High-Capacity Fueling for Demanding Builds

As power levels and fuel demands increase, injectors can quickly become a limiting factor. The COBB 1300X2 injectors provide the additional headroom required for higher horsepower applications, including builds running ethanol blends, upgraded turbochargers, and aggressive boost targets.

These injectors are often paired with upgraded fuel rails and fuel system components to ensure consistent cylinder-to-cylinder fueling under high load conditions.

Compatibility & Tuning

The COBB 1300X2 fuel 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 scale the injectors and ensure optimal engine performance.

Key Features

• Top feed fuel injectors for Subaru performance applications
• High-flow 1300cc capacity to support increased horsepower and boost
• Consistent fuel atomization for stable air-fuel ratios
• Designed for use with upgraded fuel systems and ethanol-based fuels
• Compatible with COBB fuel rails and Accessport-based tuning
• Ideal for high-horsepower street and track-focused builds

What’s Included

• Set of COBB Top Feed 1300X2 fuel injectors
• Required seals and installation components

Frequently Asked Questions

What builds are the 1300X2 injectors best suited for?
These injectors are ideal for higher horsepower Subaru builds, including setups running ethanol blends, larger turbochargers, and aggressive tuning strategies.

Are these injectors overkill for mild builds?
For lightly modified vehicles, smaller injectors may be sufficient. The 1300X2 injectors are best suited for applications where additional fueling headroom is required.

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