Direct Port Dry Holley High Ram Plate Nitrous System without Bottle Nitrous Express NX 20963-00 - USA-NX-20963-00 - Direct Port Dry Holley High Ram Plate Nitrous System without Bottle This system is sold with a Pre-Assembled Plenum Plate (No Plumbing Required). 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. The NX Dry Direct Port System provides nitrous directly into each cylinder through the billet aluminum Plenum Plate utilizing our high-flow NX Dry Nozzles . These systems are designed to be used with an engine management system that can add nitrous enrichment through the engine's fuel system. Includes jetting for 50-300hp  Includes 2 .093 NX Lightning Solenoids, WOT switch, stainless bottle brackets, 6an nitrous feedline, relay, a relay harness, and all necessary hardware to complete installation. This system comes with 1/8NPT dry nozzles