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well peep this i havent been to the sight in a while to check the form to know if its been talked about or not but here is the question i have a greedy evo ***** back stock headers and an aem cia well i get this odd sound after i'v been running my car hard or when it rains it is worse it mostly happens in the high rpm's when im slowing down and it seems as if the sound is coming below my seat is it my catyalis ? and would a hyflow cat help? just wanted to know if im alone and has anyone else had to replace there clutch?

 
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Other people with the GReddy EVO Exhaust have a rattling noise. They have found it to be the pipe vibrating against the floor-board. And they also said that it was worse when it rained. I wouldn't think a new catalytic converter would help that at all. Someone on here just bent the pipe a little to stop the pipe rattling.

Just search and you can find out what you need.

 
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/me agrees

 
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same thing when i got my custom pipes for my magnaflow.....the pipes were just rubbing against the body of the car everytime i just accelerated from 0mph....it was like some weird clicking noise coming from the passenger seat like as if ur driving wit the handbrake up or something.....either way...u have 2 options....bend the pipe away from the body of the car....which will then scratch on the streeets.....or u can just bend and flatten the part that rubs the car.....