I'm expecting my new swift to be delivered in a few weeks and have an inkling to modify it but I have no idea where the good modification shops are in Karachi. So, I turn to the pakwheels community to help me with my many questions. First of all I'm thinking of either a muffler delete or installing a valve controlled muffler, something that would increase the sound of my car without it sounding obnoxious. Secondly, I am thinking of an ECU tune that would make my car backfire and increase power but I want to know if that tune could be programmed to activate once I hit the sports mode button. I would be grateful to get a answer to any of these questions if not all and eternally grateful if you could refer me to a reputable modification shop.
