The importance of properly jetting a nitrous system cannot be overemphasized! To properly adjust the power level of street-type kits, you need to have the right jets on hand. These are the most common type of jets and are typically used in most nitrous kits. Manufactured for dealers that want a large selection of jets for various applications, or racers looking for the widest range of tuning options, these kits contain a variety of sizes to suit virtually any need.