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 appreciate the DWR1000 and DWR2000 adjustable fuel pressure regulators.  development of the dw regulators started with a comprehensive evaluation of the popular regulators already on the market.  dw regulators were benchmarked against 5 of the leading regulators on the market and designed to outperform All across multiple categories.