Hi guys, just wanted some advice what you guys think. Im pikcing up some Supra TT calipers, rotors etc for my GS. I currently have:

WORK VS XX 20x8.5 +33 off set (medium disk) in the front. I was told from the seller that it will not clear the supra calipers as it sits flush with the stock brakes. This is my dilema:

If I put the supra TT brakes on, what size spacer will I need to run in the front? I was thinking of a 15mm spacer, but I';m not sure. I don't want to buy the spacer and have it not clear still.

I just wanted to buy the spacers before hand because this is my daily car and I can't really have it down.

Thanks in advance.