Nitrous Express Gemini Twin plate systems include the most technically advanced single stage plate ever designed. The perimeter spray, direct-port pattern assures perfect cylinder to cylinder distribution. It solves problems commonly found on many single plane intake manifolds, particularly small and big block Fords. Gemini Twin systems include NX Lightning series solenoids which feature an improved flow path that eliminates sharp turns and expansion areas in the nitrous flow path. This keeps the nitrous in dense liquid form which makes more power on less nitrous. Lightning nitrous solenoids feature an integrated purge port for clean looks and less plumbing. Lightning Series solenoids feature CNC aluminum bodies topped with carbon fiber cans for the ultimate in weight savings. This Gemini Twin nitrous system includes more than the standard nitrous kit. It includes stainless solenoid to plate hard lines, nickel plated fittings, wide open throttle switch, master arming switch, 40 Amp relay and relay harness. This system is designed for 4150 flange manifolds and includes jetting for 50, 100, 150, 200, 250 & 300HP.