Perimeter Plate Nitrous system - Go, Baby, Go! Photo Gallery
10 Begin assembling the nitrous solenoid. There's a filter fitting that goes into the inlet, and one of the 12-inch lengths of braided steel -4 AN line will be screwed into the outlet. AN fittings are measured in increments of 1/16-inch, so this one has an inside diameter of 4/16-inch, or a 1/4-inch.