Cobb 08-14 Subaru STi Fuel Pressure Regulator Kit

Part Details:

The COBB Fuel Pressure Regulator Kit is designed to provide precise and stable fuel pressure control for Subaru STI models. This kit is commonly used in upgraded fuel systems where consistent fuel pressure is critical for reliable engine operation.

Designed as a return-style fuel pressure regulation solution, this kit allows excess fuel to be routed back to the tank while maintaining consistent pressure at the fuel rail. It is especially useful in vehicles running upgraded fuel pumps, injectors, or ethanol-capable fuel systems.

Application & Compatibility

• Subaru STI (2008–2021)

Features & Specifications

• Return-style fuel pressure regulator system
• Adjustable fuel pressure regulation
• Billet aluminum regulator body
• Includes mounting bracket and necessary fittings
• Designed for use with aftermarket fuel system components

Purpose & Use

Fuel pressure regulators play a key role in maintaining consistent fueling under varying engine loads. This kit allows builders to properly control fuel pressure in modified fuel systems, helping support stable operation during spirited driving and performance-oriented use.

The COBB Fuel Pressure Regulator Kit is commonly paired with upgraded fuel pumps, fuel rails, and injectors as part of a complete fuel delivery solution.

Recommended Supporting Fuel Components

• Fuel Pumps – ensure adequate fuel supply and stable pressure when upgrading the fuel system.
• Fuel Injectors – commonly upgraded alongside regulators to support increased fuel flow and power goals.
• Fuel Rails – help maintain balanced fuel distribution across injectors in higher-flow setups.
• Fuel Delivery Components – explore complete fuel system upgrades designed to work together.

Learn more about COBB Tuning performance solutions and supporting components