The Aeromotive Double Adjustable Carbureted Regulator was designed for use with the Aeromotive series of mechanical fuel pumps (P/N 027-11105 and 027-11107). This regulator guarentees precise, accurate, repeatable and reliable fuel control unmatched by any other fuel pressure regulator. Set your idle pressure separate from your high rpm setting. No jets, pills or ball valves required. The single -10AN O-Ring style port inlet port is perfect for use with a fuel log, and the -10AN return port is large enough for big mechanical pumps. The Type II bright dip anodize protects the 6061 T6 aircraft grade aluminum alloy body and cap. Also available in a 4 por(3 -8AN oulet ports) as P/N 027-13209.