140psi Adjustable Aluminum Fuel Pressure Regulator+Gauge Kit (Blue) Adjustable to Maximum Fuel Pump Capacity; Readings Range from 0-140 psi Improves Fuel Delivery Efficiency and Prevents Fuel Starvation for More Consistent Boost and Fuel Flow Designed to Maintain the Optimal Fuel Rail Pressure for High Performance/ Turbocharged Engine Delivers Vehicles' Highest Performance, with Long Life and Highly Reliable Operation Adjustable Fuel Pressure Regulator with 1:1 Ratio