Full volume at perfect pressure, the A1000 Regulator was designed for use with?our Marine A1000 Fuel Pump or any similar style pump. This regulator is perfect for naturally aspirated or ?blow-through? turbo-charged or supercharged engines. Base fuel pressure adjustable from 3-15 PSI. (1) ORB-10 inlet port and (1) ORB-8 return port. (2) O RB-6 outlet ports and 1/8' NPT gauge port. Fuel pressure rises on a 1:1 ratio when referencing boost.