This kit features a huge nitrous solenoid and large -4AN nozzle feed line. This high-flow hardware lets you select jets that will give from 50-300 additional horsepower. To properly time and control the nitrous injection, a boost pressureswitch is also used in tandem with the electronic wide open throttle switch.50-300 HP nitrous shot capability; Activated electronically only at wide open throttle using the ZEX? patented TPS switch;Timing of the nitrous injection is set by a user-controlled, fully adjustable boost switch; Includes 15LB Bottle