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Re: sports cat
I have a sports cat on my Saxo VTS and although its hard to tell the improvement in performance as I changed the complete exhaust system including the manifold from a 4-2-1 to a 4-1 if your revising the complete system then a free flow cat would help a little.
I've had two emission problems when it came to mot time the first turned out to be poor joins which where blowing and messing with the emissions the other turned out to be a blow from the exhaust manifold gasket.
The issue you will have is if you remove the cat completely which I have been told improves performance a great deal but at the cost of a mot failure and big increase in voloume, which is fine if thats your thing.
Price is also an issue as they aren't cheap
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