BBK billet fuel pressure regulators are a great way to tune your vehicle to obtain optimum air / fuel ratios and achieve maximum horsepower with the simple adjustment screw located on top.Every BBK Performance fuel pressure regulator is a direct replacement for your stock factory OEM pre set regulator and offer the best performance and value.All units have an anodized finish for great looks and long lasting finish. Please NOTE: This kit requires the use of the OE Diaphragm and Spring