So .......... Re installed the OE muffler cans yesterday. Left the ARK mid pipe in place. Better flow based on design. True X vs the restrictive H crossover factory mid pipe. After the initial install, I took a 600 mile jaunt to burn in the ARK exhaust. A combination of interstate and back road twisties. https://www.onlyinyourstate.com/texas/windiest-road-tx/ Dyno showed a mid range power loss. Not what one wants. Max gain was at WOT ......... WTF, I don't drive that way. The cabin drone around town is insidious to say the least. It sounds like a bunch of pebbles in a can being shaken violently. Exterior sound is just as annoying. Total Honda fart can effect. Not what one wants from a G70. The irony is that the ARK mid pipe w/ the OE mufflers provided the best sound/performance combination. Oh well, live and learn. I've lost more at the tables in Vegas.