The ZEX Classic Purple Nitrous System is iconic ZEX. Onlookerswill recognize the infamous purple bottle as yourace past the competition. This Classic Purple System issure to draw attention and have the crowd talking. Typical spray bar nitrous plates are built on 30 year old technology and suffer from design compromises that can result in less than optimal performanceand reliability. But ZEX has created three advanced nitrous technologies, each of which Activated at wide open throttle using ZEX? patented electronic TPS switch (Part# 82195); Cryo-Sync? Technology cools throttle body while nitrous sprays, thus creating a cooler air charge and greater HP; Airflow Enhancement? Technology creates a pocket of intense low pressure just behind throttle body, as nitrous is being sprayed, that enhances airflow into engine for greater HP gains; Included adapter ring allows plate to fit all 90mm and larger, 4-bolt style OEM and aftermarket throttle body/manifold combinations; Perimeter plate conversion kit is available separately for converting any single-nozzle nitrous system to perimeter injection