how much hp in teg

I was just wondering what the most hp an integra can make and still be street legal. now this can a ls/vtec, h22, b-series what ever engine it would take.thanx

Well, depends on how much money you have to put in it. But there are 600 HP cars runnin around. You can get 300 farely cheap and easy from a 90's LS integra. Stock longblock, intercooled turbo kit running 12 PSI, good fuel management, and 3"straightpipe exhaust, and a good clutch, maybe an LSD but not necessary.
That all costs somewhere around 5000 dollars, which is really good to get 300 HP out of a 4 cylinder. The GSR you can only boost 8 PSI, and might get 275, but the LS gearing is better for turbo.