Does the turbo have a big silencer on it like mine below
Yeah the turbo intake pipes are pretty expensive but worth the dollar, you can get them pretty cheap second hand but they never for sale long.
Mate an AGU with k03 will hit a brick wall at 200bhp so k03s would see a healthy 210-220bhp easy.
I would definatley remove the breather system as yours will be degraded by now, mine was terrible causing all sorts of vacuum leaks. If you need a hand give me a shout.
I cant recommend R-tech enough mate.