Im still fairly new to the shelby game (Ive owned my 2013 GT500 for close to a year now). I have had several muscle/performance cars in my day but these babies really react to hot weather more than any Ive had before. When the outdoor temps drop 15 degrees or more mine pulls like it has an additional 100 hp. Im basically still stock, just a jlt cai and a canned tune, MGW shifter and drag radials at this point. But man, when it gets cooler it pulls so much better. Makes me want to upgrade the cooling system to keep more of a consistent year round performance. For you vets out that may have done so, any thoughts? I know that heat is the enemy and this cant be completely overcome. But is it realistic to level it out a bit more in the states that get so smoking hot in the summer?