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Discussion Starter · #1 ·
Hi, I've had a Mongoose Cat Back on the car for about two weeks now and noticed recently it's exhibiting a slight metallic vibration around 2k revs when letting of the gas, just wondering would this be maybe like a loosened bolt? or a heat shield? I'm not to clued up though and thought i'd ask if anyone can throw some ideas's to what's most likely causing it.

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