What causing this rattle sound. Any help or suggestions?!

 

I have the same sound different set-up, let me wait and see if someone knows.
I took of the brace for the cats because at the muffler shop they said that it cracks them. It was no problem for a while now that noise is getting worse.
Also my test pipes have no connector for the brace. Someone on this site had
a good answer as he bought some rubber exhaust holders at pepboys and I think he put on the brace and use them to wrap around the test-pipes to hold them without metal to metal contact. Did you remove your brace for test-pipes?
I am also trying to figure out this rattle. Will wait for some input because I will be out of town a couple days then I will check back later. Let me know if this provided any clue.

 

my motordyne rattles like crazy, since day 1. hangs too low.

you prolly have the same issue.

 

I just used the search function and discovered that on the passenger side some testpipes rub onto the heat shield as it sounds like a metal to metal contact. On the weekend Im going to try the brace reattachment with rubber hangers and see if their if I can remove the heatshield or bend it out and use the hangars to pull the test pipe away. I feel this might be the answer I will know later after I do this.

 

Thanks! yeah let me know how it goes im bringing mine in tomorrow to get looked at ill update if they can diagnose the problem

 

Ok I will let me know what you came up with as well.

 

guy said it was a loose upstream o2 sensor. the rattle seemed to go away ill keep you posted to see if the problem is fixed permanently

 

Oh ok I will have to take it somewhere I took of the heat shield but it is still there. Tapping on the test pipe I can definately hear something loose on the passenger side one the other is tight. So maybe it is a loose o2 sensor or the resonator inside the pipe is loose but I think it should be narrowed down to that.
Glad to see you got it fixed Im going to take it to my muffler guy and let them do it.