Here is the problem..I know its the exhaust hitting the car at some point but I can't find where it is. It started after I did LTs and X pipe/bullets. I thought maybe the X or something was maybe hitting the body of the car under acceleration with things TQing around...but I recently went back to a Y pipe/catback style exhaust and it still does it. So that leaves me to believe its the headers themselves. As far as I can tell everything clears just fine. The closest point is maybe around the area of the shaft that connects the steering. Is it possible that my engine mounts are old and soft which is letting the engine move more then it should under accleration? What do you guys think? The mounts have almost 100K miles on them.

Aaron

 

Take a 3" band clamp for exhaust, and route it through an old valve spring. Put one on each header collector, and tighten as much as you can with the spring between the header and the floorboard.


Minus one knock/vibration

 

mine are close on the collector on the pass. side and when it was running rough the vibration caused it to hit the floorboard there.