Cost me about $110 for everything. 4' steel braided line, gauge cup holder, 2 fittings (not sure of size) and the 2 1/16" gauge. Mounted it on the cowl. You will need teflon tape for the threads and extra wire to hook up the light. If u want a pic, let me know and i'll post one.
IMO, its better to mount on the cowl then under hood because on the cowl u can watch the fp all the time and under all types of driving conditions (cruise, wot..)
Mike