Bodykit install them your self, get a garage to paint it for you, its not hard. Cat-back depends on if its bolt on or weld on, intake do it your self, alot can be done your self or you can ask us for info on how to do it.
GoldenWing on Bank st
Finallap in Hull
Grandtech in Chinatown, the hongkong guy, they are good at Jap cars, especially DC5,coz the boss himself own a DC5