seen this on ebay for the S3, http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&sspagename=ADME%3AL%3ARTQ%3AUK%3A1&viewitem=&item=300057599724&rd=1 sent the guy a question asking "Hi there, the s3 has got a double cat in ie 2 side by side! how will this one your selling work in place of the standard one as the dont even look the same! thanks" the response i got was "Hi . This down pipe and sports cat has been designed to do away with the restrictave standard down pipe and cats . It is a direct replacement for the standard one . Alot of chipping companys offer a stage 2 upgrade when these are fitted , so it an excellent bit of kit if your after the most you can get out of your S3 . Thanks John" Is this guy right or should the high flow cats be like the miltek ones and have a double barrel!?