ok,i got a zenki s14,and its pretty nice..now if i keep it,and heres thecatch...im highly thinking of trading for a nice sil80....but if for some reason that dont work out..should i go with a stock s15 motor and swap it in mine,or just put a built ka turbo with a posible 400+ horse?or i guess with a good old s14 sr20det..what should i do?!