so much that I just rebuilt my TT with higher compression (not 10.5:1 though; I upped it to 9:1 with some JWT 530s). In regards to intercoolers, I don't think you need to upgrade from stock with the lower boost you are running or are planning on running. Upgrading the intercoolers on stock turbos (on a TT) with the boost up at 18-19 pounds results in minimally reduced intake temps. Take care Kent, Mark