Put over 500 miles on the car over the weekend, I feel the race exhaust is not loud at all. Completely liveable.
Externally, I followed the H from behind, which was driven in sport mode and you can barely hear the exhaust during normal cruising and mild accelerations.
It is no where near as aggressive as my old turbo s with a fabspeed catless exhaust.
For those who are looking to enhance the OEM sound, this is it. For those who want the aftermarket sound and be noticed from blocks away, don't think this is the right exhaust for you. However, I only have 600 miles on the car, perhaps it gets louder later.