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. The Pro Street Diesel Nitrous System is engineered specifically to take advantage of the increased fuel delivery, oversized injectors and high boost capability of today?s high performance EFI diesel engines. 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