Made of billet aluminum with an anodized finish, the 2-Port PLUS+ has a compact yet high-volume design. With no spring in its fuel flow path, turbulence is eliminated, resulting in consistent fuel pressure. For gasoline only, this regulator is ideal for single four barrel applications up to 650 horsepower or dual four barrel applications of even greater power. The regulator is adjustable from 5 to 15 psi and offers a lifetime labor warranty.