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