I just installed the A2 today, and all I can say is "WOW." This car is a total beast now. Before when I would step on the gas I would hope the darn computer or whatever it is was feeling up to launching with some vigor. Now this thing gets up and goes everytime without fail. I know it adds no power, but it definitely unhandcuffs the power already available. This is by far the best mod I have done to any car I ever owned. A total must buy for anyone with a srt6.