K&N most popular gauze type filter.UNI most popular foam type filter.Which is better gauze or foam? Both filter and flow about the same,but theres one other factor that gives the gauze type an advantage:oiled gauze is less flammable than oiled foam.If your bike sometimes backfires through the carb,be safe and go with gauze. 
sometimes ya' gotta hold a candle to the devil.-06' Blk Spdmastr,TBpipes,Plrs-Blmth,3Trns,AI Out, ,UNI,130/40,1shm-Ea.,TBS ndls.
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