fitted the filter to my other halfs ZX-4, bike was running perfect if maybe a touch rich through the midrange before, running perfect if maybe a touch rich through the midrange now.. upshot, its better made and nicer to look at than OE, but makes bugger all difference to performance .. compared to a clean/new OE filter, obviously its WAY better than a manky one, which is what you normally have when going "airfilter shopping"..
looks easier to clean though.
recommended
