It's interesting that ford advertises the peak gains of 19 hp @ 6500 rpm and 18 tq @ 4500 rpm, when our cars make peak hp @ 7000 rpm and tq @ 4600 rpm respectively.
If you can think of any situation in which you will need "quiet mode" get it. I have it on my GT and use it almost everyday due to neighbors, LE...etc.
I just installed a Steeda x pipe on my 2019 mustang gt with active exhaust. I noticed after the install that the mufflers were tilted, the outer tips hang lower. I had a feeling this would happen. So prior to cutting out the factory resonator, I tied some wire around the exhaust piping behind...