Internally, like all GFB products you'll find unique features and small touches that make the difference between a good product, and a great one. For example, we use a double-layer, double-reinforced diaphragm with a burst strength exceeding 1000psi (68BAR)!, The inlet ports can be used in any configuration for fuel inlet (i.e. multiple rails) and pressure measurement (i.e. mechanical gauge and/or electronic pressure sensor). This allows great flexibility for installation because the fuel lines and gauge/sensor can be mounted in the most appropriate inlet port. FX-S Street version Fuel Pressure Regulator is capableof flowing enough fuel for up to 800hp,and features four 1/8" NPT inlet ports and one 1/8" NPT outlet port Universal