you gonna get better numbers by swaping in a SOHC vtec and boosting that bad boy. You could easily see almost 200whp on stock guts and thats WAY more then youll get just swapping in a gsr motor and throwing on an exhaust and intake. BUT if you must have a DOHC and you want to turbo, then you should swap in a b18b, as it will give you better numbers when you boost. If you plan on boosting with whatever motor you get, save your self some money and DONT buy the header and intake because both will be nixed when you do the turbo install.