I have a 2009 335I-X and just had a Stage 2 Dinan computer upgrade. The car is now 'stupid" fast and I am now considering going with the Dinan Free Flow exhaust. My question is, should I? Will it make the car run even better or is it a waste of money? Any other suggestions? Currently, I have about 3 inches of snow on the ground where I live and I'm not going anywhere right now. Just had the snow tires taken off and the summer tires put on. Too soon, I guess.