Three cars in this rev battle.
1. 991.2 Carrera T with steel Kline headers, 200 cell cats, muffler
2. 991.2 Carrera GTS - stock
3. 991.2 Carrera T with the Akrapovic Titanium slip on muffler

All cars sound great! The stock GTS exhaust is menacing, and really, really nice. Kline setup is higher pitched and akrapovic has a deeper tone with more burbles.

Audio quality is best we could do with a gopro and inexpensive mic, as well as iphone.
Notice with gopro the GTS is loudest in the middle because sound is captured in stereo.