[Function] - The FPR fuel pressure regulator is designed to maintain optimal fuel rail pressure for high-performance/turbocharged engines. [High Performance] - Fuel pressure regulator provides maximum vehicle performance, with long life and highly reliable operation. [Oil-Filled] - Universal fuel pressure regulator with fuel pressure gauge featuring an oil-filled design for maximum and consistent readings. [Material] - This fuel pressure regulator is made of high-quality aluminum, lightweight and durable. [Installation] - The fuel pressure regulator kit is easy to install and can be installed on the vacuum line and the return line.