“Noise is subjective to the listener. It grumbles, growls, and annoys, “
The GT350 growls. I have an ‘annoy’ setting for my exhaust but my wife likes the quiet mode.
The GT350R has the pleasing annoy sound in 1st to 5th gear. I suspect that sound in 6th gear, where it's likely you're traveling on the highway at a greater speed and likely over a greater distance, would be too much to bear. In 6th it's a completely different sound, tranquil by comparison.
In lower gears, it's a very loud and appeals to the grease flowing in my veins. Thankfully it's stock so the popo here have no grounds to issue a noise citation.