Hi, just installed megan test pipes and on the first ride i heard a rattling noise ( as heard in video) its so loud i hear it over the exhaust.... took it right back to the mechanic that installed and he checked everything and everything was tight and good, then i called the website and they said tap the resonators on the test pipes and if theres a ratttle that could be it, but no rattle when i tapped them.... Anybody know what could be causing this? I have the resonated megan test pipes stock mid pipe with the resonator and a muffler delete... Thanks in advance!

 

Forgot to mention, its only when i get on it a little bit, not when im casually cruising