Deal with nitrous outlet. I have what I consider to be a very well put together kit with lots of extras and I'm not even at the $600 mark yet. But spend your money on a nice cam and torque converter first. Like it's been said, 50 bucks to fill a bottle gets lame fast. (Some guys have hook-ups and can get it done for 30, because of where I live and the gayness that is going fast here I pay anywhere between 80-100). Mine is a "just in case I don't like your taillights" deal.