COBB Fuel Pressure Regulator for Fuel Rail Kit (315250) | Subaru STI 2008-2021

The COBB Fuel Pressure Regulator for Fuel Rail Kit is engineered to deliver stable, repeatable fuel pressure control for high-performance Subaru STI builds. Designed to work seamlessly with COBB’s fuel rail system, this regulator helps maintain precise fuel delivery under varying load and boost conditions, supporting consistent power output and safer tuning on both pump gas and ethanol blends.

KEY FEATURES

• Specifically designed to integrate with the COBB Fuel Rail Kit
• Provides consistent fuel pressure for reliable, repeatable tuning results
• Supports high-horsepower and ethanol-fueled STI applications
• Improves fueling stability under rapid throttle and boost transitions
• Compact design for clean installation in the engine bay

TECHNICAL SPECIFICATIONS

• Adjustable base fuel pressure to match custom tuning requirements
• Vacuum and boost-referenced diaphragm for dynamic pressure control
• E85-compatible construction for modern performance fuels
• Engineered for use in return-style fuel systems with the COBB rail layout
• Precision internal metering components for smooth, predictable regulation

VEHICLE FITMENT

• Subaru STI 2008-2021

COBB delivers proven, data-driven performance solutions engineered to optimize your Subaru with unmatched precision and reliability.