DeatschWerks DWR1000 Fuel Pressure RegulatorDW Regulators provide the quality, precision, and reliability that your high performance fuel system requires to deliver stable AFR and optimum performance. Adjustable fuel pressure regulators are simple mechanical devices that have not changed much over the decades and are often taken for granted. However, if you have ever experienced a failed diaphragm, fluctuating fuel pressure, or hot cold start issues that inferior regulators can cause, you will