Wes, you really know your stuff. I just inherited a 03 dx, 5sod. It's got the 2.0, but I know that there's no replacement for displacement! Can I swap out the 2.3 or 2.5 from the Mazda 6 and still add turbo? My hp goal is about 230, 200 at the wheels. I do most of all my own work so I'm totally redoing the car. Any advice would be great.