A purge kit's job is to get liquid nitrous oxide up to the front of the nitrous line in the engine bay and to rid (purge) the line of any gas or air. Remember, the nitrous feed line is 16 feet long... and you want nitrous oxide at the end of it. Nitrous Purge kits use an additional solenoid up front and a 'purge' push button on the dashboard to energise it. When you push the button the purge solenoid opens allowing nitrous oxide to rush down the line and flush it out. This 'purge' then exits through a purge nozzle or two mounted outside the car. As it leaves the nozzle it creates a plume of nitrous oxide and makes a big whoosh! For maximum 'nitrous purge effect' and to show everyone you've got nitrous on board, mount the purge nozzles on top of the bonnet or by the windscren washers. Push that purge button and purge some gas to scare the competition on the starting line!!
