Our CFN Pro Nitrous solenoids are engineered to offer maximum performance, and reliability. The Pro Nitrous Solenoid has a huge .125 orifice that can support well over 400hp. This unit is made from stainless steel to help withstand a healthy beating. The internal coil is encapsulated in epoxy for moisture protection. This solenoid has a 1/4" side inlet, and a 1/8" side exit.