FAST 30-70 PSI Adjustable Fuel Pressure Regulator, -6 SAE O-Ring Ports (1 Return, 2 Feeds) Part #307030. The FASTT Adjustable Fuel Pressure Regulator is a premium aluminum regulator designed to exact specificationsby our engineers. The unit features twin -6 feed side ports and one -6 return port on the bottom. The fully adjustable unit is vacuum referenced and utilizes a hex adjustment stud with jam nut. The unit has a 1/8 NPT gauge port, as well. The regulator is a kit, including the unit, mounting bracket, 1/8 NPT plug and 1/8 NPT to 3/16 barb. The regulator can be used with a single feed (plug second feed) or with dual feeds.