Well I have this kit on a ve gts auto. It makes 340rwkw .470 engine kw As soon as I can get the auto beefed up that number can go to 400 rwkw.The 15k would be tuned & with injectors/fuel rail. Someone put this kit on a std ss & made 320rwkw. manual always looks better on paper but on the street forget it. From the lights I can burn almost anyone.