The ZEX LSX/LSXR/LSXRT Manifold Direct Port Nitrous System is the only custom made system for the FAST GM LS Intake Manifolds. Designed to add from 75-300 horsepower, the kit uses a patented injector nozzle that delivers optimum nitrous and fuel atomization and activates at wide open throttle using our patented throttle position sensor technology. Like all of our EFI Direct Port Systems, the kit includes custom distribution flex lines for easy installation.