Tuning FN2???

Hi, so I’m new here now…. have my FN2 Type R at the door for three weeks now and I’m extremely happy with the car…is something quite different than the Golf V I’ve been driving before… Now I’m looking for some nice but not cheap-looking accessories… Who’s still doing performance upgrades at the FN2? How much horsepower are there to pick up? My two best buddies are riding the Seat Leon Cupra R on 265 hp….I’m already pretty good at the moment…but it would be much nicer to be able to drive along the side of the car….has heard about the so-called sucker tuning on about 230hp. What exactly is being done? Only changed a few driving times or what exactly happens over the software? Furthermore, I would be interested in what exactly for a hole circle of the Civic has to do… Honda first of all before you can only go up to ET30…with everything the wheels further out the TÜV wants to have a ride performance or what exactly happens?