Catless downpipes, midpipe, cold air intakes, 950cc injectors, HKS fuel pumps, turbo inlet pipes, retune, E85. Theres 420kw at the wheels. And you can still get the groceries, pick the kids up from school and drive past the cops without a second glance. Actually I added up those mods and I only paid $4000.
I think Miles's mod list is as above without the turbo inlet pipes. So very basic mods. His car was in Wheels mag or some other mag like that and it was under 400kw at the wheels. Very dyno dependant so not a fair comparison in reality.