The GFB Fuel Pressure Regulators are designed to work with Petrol, Ethanol, Methanol and Diesel fuel types.Conventional aftermarket Performance Fuel Pressure Regulators will usually feature a metal-to-metal valve and seat. The disadvantage of this is it will not positively hold pressure when your engine is turned off, making startup more difficult for the engine.The GFB Fuel Pressure Regulators are made with a double reinforced diaphram for added rigidity and a softer Teflon co-polymer seat with a Stainless Steel Valve. This material is far more compliant and will always hold pressure when the engine is turned off, making start up much easier for the engine. The GFB Fuel Pressure Regulator seals and behaves exactly as the factory fitted OE unit, but with the added benefits of a high flowing capacity and increased reliability.This part is completely serviceable and also features two 1/8" NPT ports, allowing you to fit a Mechanical Fuel Pressure Gauge and an ECU Fuel Pressure Sensor if d