Hello together, those from the forum meeting know my project now certainly already I have to have the mapping adjusted to my breakout and that of course immediately in connection with an air filter, because otherwise I would have to have the mapping adjusted again in one year. Mine has now recommended to me the Stage 1 air filter kitStage 1 air filter now I see however also tens other like zbExtreme Billet This is now an extreme price range. Bring the others so much more performance for the almost triple price? These are now prices all independent of the mapping. At the mapping wanted mine already 569 €, so I will surely drive more to Brus his screwdriver. Thanks first for your experiences. Greeting Marcel