[Hunter5179]

I've got the stage 3 tune with stock exhaust and it runs awesome. I'm sure and exhaust would be a nice addition I just don't know which one to pick yet. As far as stage 3 without exhaust.........its awesome. No complaints. Car feels more like a 3 series...more snappy and feels lighter cuz the power to weight ratio is better. Runs smooth. No issues with stock exhaust although I'm sure an exhaust would fully unleash the tune. When they install the software the dinan program asks if the car has exhaust or not....its a yes/no question and in order to proceed with the install all you have to do is press yes. If the dealer is cool it shouldn't be a problem. The car runs great.