Purge kits evacuate any air that may have become trapped in the main feed line that can cause delays or surges in your nitrous system. Ridding your system of these air pockets results in improved 60 ft and ET at the track. This purge kit's .063 orifice can flow up to 150 horsepower of nitrous which creates a massive white cloud of nitrous anytime the purge is activated. Relay and harness included. This system will fit any make, model, and year vehicle. Three feet of flexible aluminum purge line allows for you to place the purge outlet just about anywhere on your vehicle.