99gtstang

Since adding O/R x pipe to the boom tubes way too loud but... I am getting a boatload of rattles/vibrations somewhere out back.. you can hear them inside and outside but only when driving. I have been looking but need to do a thorough look. just wanted to ask you guys first if you could pin point it for me It is super loud at start up and first few miles when taking of and low rpms but gets soft after a few miles.. any suggestions?

SpartaPerformance

Try playing around with the mufflers and try re-hanging them, mine do the same thing the muffler hanger over bumps is actually hitting the exhaust hanger bracket.

99gtstang

Thanks tried it nothing.