Since I will soon get a fan-curved and already have a supersport exhaust system from kat it is only the original kat in the way! have found once at ebay something, but I am not quite sure, what do you think about it?cgi.ebay.de/Metalkat-200Zeller-E-Pruefzeichen-Rennkat-Katalyst_W0QQitemZ140103996983QQcategoryZ44206QQsssPageNameZWDVWQrdZ1QcmdZViewItem