Designed to provide the racer with an assortment of jets for his or her application. Each kit includes 22 jets (11 sizes, two each) packaged in a MaxJet™ Fuel and Methanol Resistant Jet Box (Part #MJ5-1). To order the proper kit simply refer to the Holley crossover chart to find the jets currently being used. The jet box is capable of holding 18 different jet sizes, so it gives you the option of ordering additional sized jets at your convenience.