Starting two days ago my 2010 genesis coupe 3.8 has had a very loud and aggressive rattle that happens under slow acceleration or whenever I upshift or downshift. Under harder accelerations the noise is non existant but as soon as the acceleration is slower the exhaust rattles like all hell. The sound appears to be coming from near the catalytic converter. Video link to a slow acceleration. https://youtu.be/MJt3_p4Y1Ro The car is a 2010 genesis coupe 3.8 with CNT V3 Catback exhaust, any help is appreciated. via /r/cars http://ift.tt/2tmn9ms
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