No denial that the Arlen Ness Big Sucker SS Kit works very well, increasing your horsepower up to 21%.  Few other pleated air filters on the market can match its performance. Filter is pre-oiled, ready for installation and can be washed and oiled again and again.  It is  jacketed in stainless steel mesh offering an uncompromised look. Offered in chrome or black backing plate/cover combination. Available for 1988-2009 Big Twin and XL models. Arlen Ness Store.