If you have a stock B18b block, then go with Nitrous Express, their kits allow you to use stock internals and stock fuel delivery and still use a 75 shot. And stay with a dry set up, wet systems are for serious racing only, dry systems are more street worthy and cheaper, and dont go direct port either. Get a $600 Fast and Furious kit from Nitrous Express, i know it sounds whack having a fast and furious kit, but they work on stock everything, with no timing retards, and its cheap.