Nitrous Express Proton Plus Nitrous System with 15 pounds Bottle combines performance, durability and value in a compact and easy to mount module. Proton systems contain high quality, made in the USA, solenoids that are capable of producing 150 horsepower to the wheels. The black anodized aluminum housing not only looks great, it pulls heat away from the solenoids for extreme durability. This Proton Plus system includes jetting for 35 horse power, 50 horse power, 75 horse power, 100 horse power, 125 horse power and 150 horse power. This system also includes a single Shark nozzle, nozzle adapter, stainless braided nozzle lines, extra long braided stainless feed line, stainless fuel line, master arming switch, wide open throttle switch, 40 ampere relay, relay harness as well as every nut, bolt and electrical connector needed to complete the installation. Fits all electronic fuel injected vehicles with a single throttle body.