Aeromotive Inc. is a true high performance aftermarket manufacturer specializing in fuel delivery and fuel delivery components. Utilizing aerospace tolerances and procedures, three generations of track experience, and a meticulous approach to engineering, Aeromotive Fuel Systems has become the absolute pinnacle of performance fuel delivery. P/N 13103 Ford Rail Mount EFI Adjustable FPR3-Bolt Mount, Adjustable FPR Vacuum/Boost Reference Adjustable billet fuel pressure regulators designed to handle the demands of the Ford 5.0L & some 5.4L engines. Installs easily on the stock factory fuel rail. 86 - 93 5.0L Adjustable from 30-70 PSI. Fuel pressure rises on a 1:1 ratio when referencing boost. 1/8' NPT gauge port. Stainless steel spring, custom-designed for precise fuel control. Installation kit includes O-rings and gaskets. See also:  P/N 13102 94 - 98 1/2 4.6L 94 - 95 5.0L.