I got a problem with my new exhaust. I hear a rattling around 3k RPMs. My friend matt commented that my exhaust is really close to my rear differential. I'm thinking its getting some metal on metal contact and that is casuing the rattle/buzz noise. Anything else could be causing this? I ordered some heat wrap to try and fix the problem and if that doesn't work I was gonna order some urethane hangers(kartboy). Any help would be greatly appreciated.

 

hangers are a good idea i have kartboys on mine and the exhaust dosen't move my exhaust use to move and hit under my seat i bought those hangers and problem solved

 

Definitely do the exaust hangers (Kartboy, Perrin, Sti) also get under the car & check to see if the heat shields are rubbing on the exaust, or see if the exaust is hitting the rear dif (do you have a rear dif protector? could be hitting if you have one )