Originally Posted by 37drift

I'm experiencing basically the same thing on my polished set of ART's. Keep me posted on your issue. I've got about 450 miles into my install and I've been experiencing a rattling/jingling sound which has progressively gotten worse since about 150-200 miles. At first it was only noticeable from the 1750-2750 rpms range, now it's noticeable from 1750-5000 rpms. It's noticeable at a good distance from my car at this point, and a little embarrassing. Sounds like bad bearings on an alternator or something like that coming from inside my pipes.

Tony says it should go away, but in the meantime, it's bugging the hell out of me. Fingers crossed because I really don't want to have to swap these back out.