I am assuming you bought this exhaust used? didnt read your entire post but this bothered me ( THE COUPLING THAT IS HOLDING THE EXHAUST IS NOT THE ONE THAT CAME WITH IT. ) maybe im just being picky... anyways. AKRA has the least drone of all exhaust. and if thats loud for you stock is the only way ...
but anyways good luck. i Had installed my Akra for 2 years now and barely just broke it in... for the last 2 months, it had increased at least 20% in noise... i am currently running a slip on but had a not cat non res pipe before and that was crazy.... just wasnt drivable... well for me anyways. I also had the 200cat and a resonator and that was perfect.. which is the EVO version...