Well, including the kit, the CC carbon clutch, the head gasket, the tuning, and the labor, I think these guys spent over $7,500 easy.

I don't really recommend the inline pro kit though because it is a real pain to install, AND you have to cut a big 3" x 8" hole in the frame rail for the turbo to fit (if you are running the bigger turbo, like RX4BRDM's).