4500 Covert Crossbar Plate System Pro-Power 100-500Hp without Bottle Nitrous Express NX 63571-00 - USA-NX-63571-00 - This innovative nitrous plate system provides all the benefits of Nitrous Express's renowned Billet Crossbar Systems but with a revolutionary twist. Stealth Installation Unlike traditional nitrous plate systems, the Covert Crossbar sits discreetly inside your intake manifold rather than on top of it. This unique design means you no longer need to invest in expensive cowl hoods or modify your existing hood. The covert crossbar plate allows for a completely hidden nitrous system, with both the nitrous and fuel inlets strategically placed at the back of the plate, pointed toward the firewall for ultimate concealment. Precision Engineering While installation does require machining of the intake manifold, Nitrous Express has you covered. We provide comprehensive instructions to guide you through the machining process. We also offer a convenient machining and plate installation service for those seeking professional assistance  Unmatched Distribution The Covert Crossbar ensures optimal distribution and atomization of nitrous and fuel, delivering consistent and powerful results every time. NX Crossbar Nitrous Plates have a meticulously engineered spray pattern that ensures an accurate mixture of nitrous and fuel is injected into the runners. This precise delivery provides a more even distribution to each cylinder, resulting in improved combustion efficiency and maximum power output.  Key Features: Covert Design: The plate sits underneath the carburetor, eliminating the need for hood modifications while remaining hidden. The nitrous and fuel inlets are positioned at the back of the plate, pointing toward the firewall. Uncompromised Performance: Offers the same power and reliability as our standard Billet Crossbar Systems. Experience the ultimate combination of hidden power and seamless design. Perfect for those who want to maintain a sleek, unaltered vehicle appearance while unleashing unbeatable performance. *Does NOT Include Manifold. Instructions PDF