SophiaZ

This may or may not be a dumb question but either which way..I need an answer. I bought the dual intakes (not gen 3 long tube) and they say it has a 1,000,000 mile warranty. But I'm going on 3,000 miles with it installed and was wondering if it has to get cleaned. I haven't found any replacement filters for it and don't know what to do. If it needs cleaning, how do you do it? Thanks so much!