The Nitrous Express 50-300 horsepower plate system jet pack is manufactured on CNC equipment, and is guaranteed to be within .0005 of specified jet size. Nitrous Express jets have 35 percentage more flow through the same orifice compared to other jets. The NX jet was designed to be more than just a hole in a piece of brass. tts contoured inlet and multi-stepped outlet allow turbulence free flow with no restrictions.