Nitrous Oxide System - NOS CO2 Regulator 100 psi Outlet (15855NOS)Managing the pressure of your fuel nitrous system can be very important for safety reasons and consistency issues. NOS has the regulators you will need to keep your system perfectly balanced. Carbon Dioxide Pressure Regulators For High Perf. Fuel Injection For Large Nitrous Systems Adjustable From 5 50 psi Simple Spring Change Features 1 Inlet and 3OutletPorts All 0. 25in. NPT Threads Color Blue Boost Vacuum Reference Port No Fittings Included No