I also had this exhaust on my buggy. For me it was in terrible... it was a noisy bright sound and the motor sounds always a kind of hard on.
It sounded as if the engine turns much higher than it really did. If you hold the exhaust in the hands, it feels so slightly as if it is made of plastic. When I turned on the engine for the first time, all the color burnt on the exhaust and the garage was filled in white fog.
For me it was the only good thing on this exhaust that I have just wasted 100 dollars on it.
An other big thing: with this exhaust it is hard to mount a oil pump cover for a full flow oil system. The oil lines are mutch too close to the exhaust