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I just had my 5Zigen installed about a week ago. Everything seemed find untill a few days ago. Something on the exhaust ratted like a mofo! So I jacked the car up and reved up and hear the rattle in the cat area but I don't see what is rattling. All 4 bolts on the cat are held on real tight too. I used the new gasket from the midpipe to the cat that i got with my exhaust system but I used the old gasget from the exhaust manifold side to the cat. I completly took out the cat when I installed it because I had to get the old bolts out because the heads off the bolts were broken.
Okay now that I got you even more confused. Do you think all the rattle I am hearing is a heat shield or what? Or could exhaust escaping though exhaust manifold/cat area where it is connected because the old gasket was used. It's driving me nuts and sounds horrible!!!
Could this also be the common heat shild rattle that many people have?
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