Having wired the flaps open at all time, I'm pretty happy with the sound. Burbles have definitely picked up. Personal taste, but the "cracking" exhausts sound Ricer. I would definitely go for a muffler delete, Res only, as my B&Bs had on my C6 Vettes. Cats left alone. Loud--as no mufflers, but Resonators tuned the sound nicely. NPP on my C7 with fuse pulled also sounded great. But, no turbo 6 is ever going to sound like a 6.2 liter V8. Still...always room for improvement.
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