With URBAN exhaust , you will get a increase a little the sound respect to the origianl exhast also It decrease the weight repect to the original one and this increase the performances.  With RACING exhaust, you will get a reasonable beautiful sound and it is higher than the original, also you will get more

Always, we are always thinking, obviously, on their PERFORMANCES, they are: Smoother performance. Weight reduction (inertial control). Higher refrigeration allowing less temperature due to the new variator design with sink. Higher quality for all components of speed control, higher durability and less maintenance. Faster operation. Higher reaction on the throttle gas Press-Depress of the rollers.