BBK billet fuel pressure regulators are a great way to tune your vehicle to obtain optimum air / fuel ratios and achieve maximum horsepower. Each fuel pressure regulator is made from high quality CNC machined billet aluminum with a long lasting anodized blue finish. Each fuel pressure regulator is hand assembled with a precision leak free diaphragm that will allow fuel pressure adjustment to approximately 65psi. These BBK fuel pressure regulators are direct replacements for your stock pre set regulator and offer the best performance and value. All units are pressure tested at the factory. Tuning is accomplished with the simple twist of a screw.