GENSSI Type S Adjustable Fuel pressure Regulator FPR Universal JDM Turbo (Silver) GENSSI Universal Fuel Pressure Regulator TYPE-S Model (Silver) . Pressure Adjustability - 2.0kgf/cm~8.0kgf/cm When injectors and fuel pumps are upgraded to a larger flow setups, the stock fuel pressure regulator will not be sufficient to meet the pressure requirements for the new setup. Furthermore, the stock regulator is already preset from factory for the standard setup and non adjustable so it will be restricting the tuning potential of the vehicle. The GENSSI Fuel Pressure Regulator will ensure stable pressures are supplied with the oversized diaphragm. This special design has proven to maintain the required pressure levels with any adjustments made. Diaphram Diameter - 33 Vacuum Hose Diameter - 4.5mm Fitting Parts - AN6 1/8NPT x2 #8 Straight 1/8NPT x2