Need exhaust help

I have a 360sbm/430hp with full 3 inch TTI system, including their supplied Dynomax muffs. I had to sacrifice the X-over to install a GV overdrive and lost some TQ down low.The system is only noisy when I stand on it.Never been pulled over for noise. No highway drone in O/D. 62mph=2200rpm. 74lbs from collectors back to bumper.