You can get the same if not more power from a k03s hybrid, sell the k04 for some profit lol. On the audi-sport forum when I was on that most people claimed 270bhp but normally had 250-160ish bhp when rolling roaded. badger 5 does the k03s hybrids and he got 270bhp out of one the a3's he done. Think he done it all for 2k. then obviously you'd need 312mm brakes fmic and clutch and injectors etc. Just less hassle than swapping it to a k04 turbo, lines etc.
it's a popular mod on seatcupra.net I believe.