Headers making "jackhammer" sound when I accel
I have a 2005 GTO with custom headers (made from a reputable high performance shop), Supercharger, Stock Mufflers... The exhaust sounds fantastic at the muffler end but its so loud with a Jack Hammer sound when I accellerate.. When idle or at a consistant cruise its fine.. but when I accell its crazy insane.. it sounds wrong. It happens both hot and cold.. be it outside temp or even engine temp but it does have an even more violent jackhammer sound when colder.. Is this my Headers?? Is this sound something you or anyone has heard before?