Exhaust problem

[ruskiMSP]

So put my stock exhaust back on, and at first the shop put it in wrong, so the muffler was hitting the bumper, and it was vibrating like sh*t, so i took it back figuring they would move it and vibration would stop. They moved it down into proper position, but i still have vibrations in my car at 3k RPMs, that can be felt anywhere in the car. Any ideas, what can be causing this? I have kartboy exhaust hangers.
Any suggestions / ideas would be appreciated. thanks.

 

[woodstockstr]

it might be hitting your real axle...?????

 

[ruskiMSP]

i dont think so, and only does at 3K Rpms and up

 

[Kansei]

Kartboy exhaust hangers make the exhaust sit higher because they don't stretch. With my racing beat, it took a little effort to get it adjusted right so that it wouldn't hit the subframe where it bends up and over the rear suspension.

 

[orng1]

Take it back ask them to put it on the lift and have someone in the car so they can see where it's hitting when its at 3k rpm. No use in paying someone to do he job wrong.