Can I bolt on TII 4 pot calipers in place of my stock calipers? Do I need different rotors, or any other misc parts?
Thanks.

 

Are your wheels 4 lug or 5 lug? Because I'm pretty sure the brakes on those are different diameters.

 

If I remember correctly, the GTU has the same brakes as the TII.

 

NO NO NO
i have a gtu with T2 brakes.
here is the deal.
when you get your T2 calipers make sure you pull off all the brackets as well. you can use the bracketing to make the swap painless.
on the rear the calipers will be too big. I tried to use turbo rotors and my stock GTU brakes and had to update to Turbo spec calipers.

So to conclude this is my brake setup.
Powerslots all the way around (these are big and very nice). T2 calipers up front and in the back. Stock pads up front and Porterfield R4s in the back. R4s all the way around on track days.