K03s is straight forward bolt on

You will need a new map nick does the superb AGU k03s map which is super smooth

You can drive it on you currant map with the k03s.
The k03s is the only bolt on option - you have the k04 and then aftermarket stuff like garret ect, these all require lots of work and parts to fit though
EDIT *If you have an AUM is should have a k03s already! *