*Honda/Acura* Billet adjustable regulators specifically designed for Honda and Acura engines to provide fully adjustable base fuel pressure. These regulators are direct bolt-on for engines with the factory fuel rail or aftermarket fuel rails designed with mounting provisions for the stock regulator. *Ford Regulator* Adjustable billet fuel pressure regulators designed to handle the demands of the Ford 4.6L, 5.0L and 5.4L engines. Installs easily on the stock factory fuel rail. *GM LT-1 Regulator* Originally developed with the GM LT-1 engine specs in mind, these regulators were designed to keep these cars performing at their peak potential. These rail mount EFI regulators fit a variety of factory GM vehicles. See a list of applications below: