bought a 2009 SRT challenger and it did not have the mufflers on the car. After buying the car I had mufflers installed. Aggressive of course however after being installed the car seems to stall at a dead stop when punching it. What happened ? Do I need to get the engine tuned for the added on mufflers ? Very strange this happened and have no idea how the new tuning works on this engine... thanks ..for some reason can not find my answers on .