EFI Small Block Direct Port Nitrous System

  • Adjustable From 75 to 300 Horsepower
  • Distribution Flex-Lines For Easy Installation

 EFI Small Block V8 Direct Port Nitrous System

complete, easy-to-install direct port nitrous system for any V8 EFI engine. The kit adds 75-300 horsepower; uses our self-adjusting, patented injector nozzles; and activates nitrous at wide open throttle using our patented throttle position sensor switch technology. The kit includes everything necessary, including a bottle, brackets, solenoids, plumbing and electrical connectors, making it a snap to install on virtually any V8 EFI engine.


  • Complete wet nitrous system; Includes everything for a safe, proper install

  • Adjustable from 75-300 HP w/ supplied tuning jets; Perfect for built competition engines

  • Distribution flex lines make for an easy fit on your manifold; No time wasted on bending & cutting hard lines

  • Includes a 10 lb. nitrous bottle, brackets, nitrous & fuel solenoids, electronic throttle activation switch & all plumbing & electrical connectors



Active Fuel Control™

Active Fuel Control™ is a revolutionary nitrous tuning and safety feature. In your engine, a vacuum is created as nitrous gas is sprayed across the open end of the nozzle’s fuel transfer tube. As bottle pressure rises or lowers due to bottle temperature changes, the speed of the nitrous discharge varies to the same degree. This causes the level of vacuum draw in the fuel transfer tube to vary as well. This variable vacuum draw causes the ZEX™ nozzle to actually “pull” more or less enrichment fuel into the engine. This means your engine never runs dangerously lean or overly rich. The nitrous tune-up stays dead-on for maximum engine safety and power at all times.

TPS Sensor Activation

Our throttle position sensor switch is truly innovative. For years, nitrous systems have been activated by use of crude push buttons and throttle arm activated micro switches. These devices were very difficult to install and were constantly failing because of the extreme temperatures found in vehicle engine bays. ZEX™ integrated advanced microprocessor control circuits into our nitrous systems so that they "learn" the voltage curve of an engines throttle position sensor. This enables our nitrous systems to activate at wide-open throttle, precisely and reliably, every time.

Fuel Shear™ Technology

ZEX™ Fuel Shear™ Technology injects enrichment fuel using a fuel transfer tube. This tube allows the ZEX™ nozzle to directly inject fuel into the highest velocity area of the nitrous plume. This high-speed nitrous shears the fuel away from the tube, atomizing it to levels other nozzle designs never achieve. This high level of atomization ensures perfect fuel distribution from cylinder to cylinder, ensuring one cylinder is never dangerously rich or lean, like competitor’s nozzles. This finely atomized mixture delivered by the ZEX™ nozzle also burns more powerfully and maximizes the horsepower you get from your nitrous system.