[Function] - FPR fuel pressure regulator is designed to maintain the optimum pressure in the fuel rail for high-performance / turbocharged engines. [High Performance] - Provides the highest performance of vehicles, with long service life and extremely reliable operation, fuel pressure regulator [Oil Filled] - Universal fuel regulator with oil-filled design fuel pressure gauge for maximum and consistent readings [Material] - This fuel pressure regulator is made of high-quality aluminum, lightweight and durable. [Install] - The fuel pressure regulator kit is easy installation, can be installed in the vacuum tube and return tube