First off is a edelbrock concielded nitrous kit with a 10 oz bottle gives 30-60 HP and costs 256$
http://www.summitracing.com/parts/EDL-70027/
next is Nos sniper kits, Nitrous Oxide System, Sniper, Wet, 100-150 hp, 10 lb. Bottle, Orange, Square Bore, 4-Barrel, Kit . 389$...