Ok, so what im leaning towards in regards to mods vs power; we can say if you are not murderous on your car everyday upto 240rwkw should be fine with a well serviced standard btr, this power is typically achievable with a good custom tune and CAI. For an extra safety net, add a transmission cooler(around $200), this should be safe for a little more power... say 250+rwkw e.g full exhaust, CAI, and tune. The above seems like the typical "stage one" tune for the T. For us BA T owners its starts getting a little more expensive to go further safely and getting into the "stage two" tune territory, this would require valve springs, cooler,strengthened box, fuel system, more boost etc.