I have the Ultra version, Sounds nice enough.
Cons: Fitted in Jan and the rubber on the black mount is already perished and cracked (this may be down to it being a right t**t to fit as it doesn't come fitted and you have to get it on yourself)
U Clamps provided are also very poor quality and snapped when fitting.
Also very hard to get this sitting dead center.
In short if you get one buy some sealant and good quality u clamps and should be reet.
The pure motorsport ones look to have far more pieces and connections than any of the K-Tec cat back systems. To me just seems like more that could go wrong.
This is the ones I'm leaning towards - http://www.k-tecracing.com/show_product.asp?id=1264&appid=2