Description There is a diaphragm inside our fuel pressure regulating valve to control the opening and closing of the pressure valve. It has good sealing performance and small pressure gauge error, so it is an ideal fuel system modification. It can improve power, increase torque, and effectively improve the problem of unstable idle speed when starting. Key Features High-quality Material: This fuel pressure regulating valve is made of high-quality T6061 aluminum. Its surface is rust-proof, high strength, durable, and not easy to damage. It can be used steadily in a variety of harsh environments. Strong Pressurization Capacity: Its pressure can be adjusted from 0 psi to 140 psi through the fuel pressure regulating valve. You can adjust the pressure according to your needs. High Precision: The oil in the gauge stabilizes the needle, which provides you with accurate readings for adjusting the pressure more accurately. Excellent Function: It can improve fuel delivery efficiency, provide