So I guess I dont understand your question then. If you have a 2.7 TT you must have two intercoolers already in paralell.
Were you looking to go with a front mount? Whats your manifold temperature now?
It may be way simpler for you to go with pressure activated water injection. This will work A LOT better than a front mount, and be staggeringly less expensive.
You might also want to look into aftermarket ducts to better feed your existing cores.