This is a sound comparison video of the Borla Atak vs Corsa Sport exhausts. Both clips are revving of about 2K, 3K, then 5K RPMs.
No engine modifications, so this is what stock would sound like.
First sound clip is Borla, second is Corsa.
The Corsas are significantly quieter in the cabin with virtually no drone. the Borlas drone in the cabin. They both have similar volume outside of the car.
