The cars do sound very different. No where near as loud as before. You can hear the turbo whine, and distinctly hear them when they switch gears. I didn't wear ear plugs all weekend, and you could actually speak comfortably to the person beside you except if multiple cars were passing all at once. There isn't the tat-tat-tat of the backfiring as they slow down, either. You don't feel the noise, either, like you did with the old engines - where it would rattle your chest when they passed.

I didn't mind it, but it is quite different. I could understand if people really liked the noise and vibration, they may be disappointed.