Just changed my can to a race can. No difference at all in volume. Even with the can not fitted to the collector box it is still quite. The restriction in the sound/exhaust is in the collector box which goes all the way into the down pipes from the engine. The only way to get a race sound exhaust is to get rid of the collector box which means a whole new system form the front pipes back. Very disappointed. If your thinking of changing your exhaust can to a race one, do not waste your money, the sound will be no different !!!!