For Ultra-High Horsepower EFI Applications!If your application requires over 600 lbs and hour of fuel, use the Pro-Series Boost Reference EFI Regulator. Adjustable from a base pressure of 30 to 60 psi, this regulator has a virtually indestructible, electrolyse nickel-plating finish on the body. It also features two CNC-machined stainless steel vacuum/boost fittings that offer two installation options, a traditional hose bard to reference boost/vacuum, and a -4AN fitting to reference boost in ultra high horsepower applications. There are also extra ports available for data logging and a 1/8''NPT port for pressure gauges and transducers. Aeromotive's exclusive AN cutoff tapered flare fittings, o-rings and port plugs are included.