TT engine gurus, HELP

[Tiago]

I want a fast car, so i was thinking in a GT2 because it is more easy to mod and to achieve my goal of reliable 600hp. But after reading some threads where, i realized that the X50 kit it gives to the TT almost the GT2 engine specs (IC's, K24 turbos, exhaust...), and it is more easier to get a good TT-S with less money than a GT2. The four seats, AWD safety, PSM and other TT goodies are always welcome to me too. I already owned a Porsche with some mods, so the names TTP, FVD and EVOMS are the reference of engine tuning in P-cars, specially TTP but their stages it seems a bit pricey when compared with FVD stages. I made some research and found that with a stock TT-S i only will need exhaust (headers and muffler), reinforced clutch and ecu calibration to achieve my goal (600hp). I need some help in money/hp wise from you to get 600hp.

Why can't i find a muffler without cats??? <_< More that 3000euros for a muffler is crazy. I was thinking on a custom job in the stock muffler by cutting off the cats and replace them with straight pipes. It should improve alot the exhaust flow with only a few pennies. Will it cause any troubles with the O2 readings?

I liked the look of the EVOMS airbox. It seems a reasonable price for a nice sound and extra ponnies. What do you think of that?

So my thought is:

Evoms intake: EVO V-Flow Induction System

TTP Headers

Custom muffler (OEM without cats)

Reinforced clutch: <_< TTP or Evoms

Ecu calibration: <_< TTP or FVD

How much will i spend on this mods, and how much hp will i get? Tell me your best combo package for 600hp(money wise)?