Hello together, I’ve been playing with the idea of getting a sports air filter for quite some time now (for better breathing and thus possible spritesparrnis). either k&n or a similar to this ebay offerhttp://cgi.ebay.de/ws/eBayISAPI.dll?… question: 1. how are your experiences with it? (fuel saving (due to better air throughput)) 2. are the parts allowed at all, it is spoken of by tuev opinions but is that equal to abe? would me about your answer en happy thx geniesaloon