Process West Billet Fuel Rails Black Subaru WRX 2002-2014 / STI 2007-2018

The Process West Billet Fuel Rails are a true motorsport-grade fuel system upgrade, precision machined from solid billet aluminium for maximum strength, flow capacity, and reliability. Designed for high-power Subaru builds, these rails eliminate the limitations of factory-style fuel delivery systems and provide a robust foundation for large injector and high-flow fuel setups.

True Billet Construction

Unlike lower-quality machined extrusion alternatives, these fuel rails are:

• Fully machined from solid billet aluminium
• Engineered for maximum structural integrity
• Designed for high-pressure, high-flow fuel systems
• Built for long-term performance under extreme conditions

This ensures consistent fuel delivery even in demanding high-boost applications.

High-Flow Fuel System Capability

Designed to support serious performance builds, the rails accommodate:

• Large capacity fuel systems
• Modern high-flow fuel injectors
• High-demand turbocharged applications

Key features include:

• Provision for -8 AN fittings for high-volume fuel flow
• Twin top and single end entry/exit configuration for flexible plumbing layouts
• Optimized for both return and returnless-style setups depending on configuration

Injector Compatibility Options

To suit a wide range of builds, the fuel rails are available in:

• 11mm injector configuration
• 13mm injector configuration

This ensures compatibility with both OEM-style and aftermarket high-capacity injectors.

Flexible Installation & Integration

Each kit is designed for straightforward integration into Subaru fuel systems and includes:

• Two -8 AN plugs
• Full mounting hardware
• Compatibility with OEM or Process West billet TGVs

This allows for clean installation across a variety of build configurations.

Engineered for High-Power Applications

Ideal for tuned and high-output Subaru builds, these fuel rails provide:

• Stable fuel delivery under high boost
• Improved injector support for large power setups
• Enhanced reliability for track and street performance

Key Features:

• Fits Subaru WRX 2002–2014 / STI 2007–2018
• True billet-machined aluminium construction
• Supports -8 AN high-flow fuel fittings
• Twin top and single end entry/exit configuration
• Available for 11mm or 13mm injectors
• Includes -8 AN plugs and mounting hardware
• Compatible with OEM or Process West billet TGVs
• Designed for high-power fuel systems

Performance Benefits:

• Improved high-flow fuel delivery capability
• Increased reliability under high boost
• Stable fueling for tuned engines
• Supports large injector setups
• Reduced fuel system restriction