Cobb 08-21 Subaru STi Fuel Pressure Regulator Kit

The COBB Fuel Pressure Regulator Kit for your 2008-2014 Subaru Impreza WRX STI uses a billet aluminum housing, which is lighter and stronger than stock. This kit is designed to replace the factory regulator, which can sometimes become a restriction or fail over time, especially in modified vehicles. Maintaining consistent fuel pressure is crucial for proper engine performance and tuning, ensuring your engine receives the right amount of fuel under all conditions.

This regulator is built with a high-quality diaphragm and spring, calibrated to maintain a steady 3 bar (44 psi) of fuel pressure. This consistent pressure is important for achieving predictable fuel delivery, which is key when you're pushing your engine hard or have made performance modifications. The kit includes the regulator, a mounting bracket, and necessary hardware for installation, making it a straightforward upgrade for those looking to ensure their fuel system is up to the task.

While this kit is a direct fit for the 2008-2014 Subaru Impreza WRX STI and also fits the 2015 WRX STI, it's important to note that it is not CARB approved and cannot be shipped to California. If you're rebuilding your top end or tuning your engine, ensuring your fuel delivery system is reliable and accurate is a smart move.