the more I hear about it the more I become interested. I see that its cheaper then turbo. If I would get NOS I would go for a JWT. A few questions, first of all, how long and how much know how do u need about cars to put a system in?? dumb question here, but are they street legal? I live in PA so I dont' know what there laws are on that stuff. Does it put alot of extra stress on the engine? I know a turbo does. This is my only car that I would be driving so I cna't put this on if it will create alot of problems. Where do you get the tank filled? how long does it last? How much does it cost to get it filled??