Decided that I gotta have me a carbon-fibre Remus Exhaust as in the picture. Options are with or without CAT. The man from Remus says: If your motorbike has got catalysts, you should have to use exhausts with catalysts. Otherwise you have to correct the registration papers and to cancel the use of catalysts. From the year 2006 there will be a different tax for motorbikes with and without catalyst. At least: There are no adjustments at the carburettor required. Whereas my local dealer (near Munich) says it doesn't matter about changing paperwork. Prices are 1030 Euros with the CATS and 850 Euros without. (thats about $1240 and Â£$1,020). So my questions are: 1. Will it make much difference (apart from the costs) if I have with or without the CATS? Changing paperwork here in Germany is complicated, and if I crash with something incorrect on the bike it could get tricky. 2. Seen lots of posts recommending raising the needles even on the stock models - the Remus in theory should let it breath better so should I override the nice man from Remus? Jonathan.