My 2014 Charger R/T had a nice Borla system on when I got it. A few months ago, I caved to pressure from my mechanic and did a resonator delete. It sounds mean as hell, and I love it...95% of the time. The drone on the highway is a bit much when it switches to 4 cylinders, and I end up often switching to 5th gear to get it to quiet down, which is less than ideal gas wise..

.I have been thinking of possible solutions to keep the exhaust sound the way it is now without the resonator while also being able to switch to something quieter at certain times. I know this may sound unorthodox, but would adding a second muffler with a butterfly valve where the resos used to be work? Looking specifically at the Varex mufflers.

https://www.xforceusa.com/products/varex-mufflers

The Varex mufflers would be open almost all the time (which is essentially a straight pipe), except on long stretches of highway driving or coming home late at night, during which I don't care how the exhaust sounds. I also don't want to replace my current mufflers with them, because the Borlas sound great and having just the Varex's instead with open

valves and no resos would be way too loud.All the reviews I've read is that when the Varex mufflers are closed, the exhaust is extremely quiet and eliminates drone, so I am confident it would do what I intend. I guess the only potential issues (and I'm not an expert, still learning a lot) are possible performance loss and/or engine damage?

I could live with the former, but definitely not the latter. Any input would be greatly appreciated!

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