I doubt my cellphone mic would do a good job of recording anything of decent quality. I hear a little more turbo I believe and it and it may have gotten a little louder. However, I swapped the downpipes out of necessity rather than want. The local Ford dealers wanted my vehicle for on their lot for almost a month to inspect the cracked flange, order new pipe and install and I couldn't do that as I only have 1 vehicle and neither dealership had loaners. A rental would have cost more than the downpipes. So I ordered them and Ron at Woosh Motorsports came through and got them shipped the same day due to the cabin filling up with exhaust every time I would slow down or stop. I do NOT think it is worth it to swap out only the downpipes and keep the factory exhaust. I plan on getting a Thermal R&D system eventually or just replacing the flex pipes.