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Discussion Starter · #1 ·
I am hearing a weird noise coming from the back of my car. It's an 05 GT and has an OR/H with borla atak mufflers. I'm thinking it may be vibration or something? Because the h pipe is newly installed. The sound can be heard a lot of the times on a cold start or when I down shift 2 second while doing about 40. The sound almost sounds like a fat person getting out of a screechy bed. It's like a screech noise almost like what shocks sometimes make if your going over a bump or something but it makes the noise while sitting still so it isn't my shocks.. Any idea what this could be? A friend suggested wheel bearings?
 

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I don't think wheel bearings make noise when the car is sitting still. I would crawl along the side of the car while a friend revs the engine and see if you can isolate the noise. My guess it has something to do with your exhaust, maybe a loose baffle inside one of your mufflers.
 
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