I have a stock 85 t-type, with a completely stock drivetrain. The car has 180,000 miles and is obviously used as a daily driver. I am mostly interested in cooling down that piping hot air, and alittle permormance boost would be nice. Which system would be best for me. I am also unfimilair with how these systems work. Are they activiated only under full throttle, or are they controled by a button and used only when you want it to be used. Any kind of help would be greatly appreciated. Thanks.