Kirban Billet Aluminum Adjustable Fuel Pressure Regulator for Ford Mustang: PN KPP-5005. Maximize the performance of your EFI fuel system with a wide range adjustable high flow fuel pressure regulator. This billet aluminum regulator is a direct replacement of the stock regulator utilizing the stock mounting interface. Fuel pressure regulator is fully adjustable from 30-100psi allowing the performance enthusiast to finely tune the EFI fuel system which is especially useful when matching aftermarket fuel pumps and fuel injector nozzles. The slightly smaller than the stock size allows installation with virtually any aftermarket intake manifold. Large internal fuel feed and return ports improve fuel flow over 30% reducing restriction of the regulator which is essential in any performance application using a high flow electric fuel pump(s). High quality billet aluminum design uses two internal o-rings that eliminate any possible leakage. Boost sensitive (perfect for turbo applications) vacuum port location is same as stock. Each unit comes with new mounting hardware to the fuel rail. 100% Made in America!