Aeromotive 13201 Regulator, Carbureted Adjustable, Billet 2-Port AN-6 Popular in circle track applications up to and including NASCAR level horsepower and as a dedicated nitrous regulator Not rated for alcohol fuels, ethanol or methanol Adjustable from 5-10 PSI Dedicated 1/8' NPT gauge port Regulator re-seats when the needle and seat closes, preventing pressure creep