Having a 205gti which I will be using for club race days and driving on the street, what are everybodys thoughts about removing the CATALITIC CONVERTER. I know the standard gti exhaust system is pretty good as standard, so I dont want to stuff around with it if its not going to improve the breathing and power. the engine has been rebuilt using a JAZ head off a 405SRI and compression raised to 10.1 Would removing the CAT and putting in a straight pipe improve the performance ????. cheers.