I recently went "stage 2" on my 2014 WRX with Grimmspeed's divorced downpipe, and also got a tune at Cobb's Plano facility (awesome guys by the way). I knew initially that upgrading to a more efficient intercooler was highly recommended upon reading posts from various forums. Unfortunately, I am in a transition of changing career fields, and dropping close to a thousand dollars was not a viable option. So I went with the next best thing of upgrading the existing TMIC and wrapping it. I purchased three items from Rallysport Direct; 12x12 and 12x24 sheet of aluminized heat barrier from Cool It Thermo Tec, and Perrin's throttle body/intercooler coupler. The sum of these items to include shipping ended up being under $100.
I was impressed with the aluminum heat barrier's craftsmanship and price. The product was rather thick, woven beneath the aluminum surface, self-adhesive, and inexpensive (compared to gold wraps). As previously mentioned, I purchased a 12x12 and 12x24 sheet, and ended up using the 12x12 sheet in its entirety, and using a quarter of the 12x24 sheet.