This Holley Hi-Ram Dry Direct Port System takes full advantage of the Holley Hi-Ram manifold. The Plenum Plate bolts right in between the upper and lower intake manifold, making the installation super clean and quick! This Hi-Ram Direct Port System injects nitrous directly above each cylinder from the side of the runner, giving you the most accurate distribution possible without slouching on power! The system comes complete with billet aluminum and carbon fiber Lightning Series Solenoids, stainless steel braided lines, wiring, switches, and every nut, bolt, and connector needed to install the system. If you order your system with a nitrous bottle we include the industry-exclusive billet aluminum Lightning 500 Bottle Valve and stainless bottle brackets.