One of the coolest,simplest ideas for air filter kits today. Our innovative hiflow air filter accepts any five hole Twin Cam derby cover on the market. Choose Ness,HD or your favorite aftermarket design. Some Styles are available as a complete kit that includes a popular Ness designed derby cover.Fits 1988XL Each kit includes our patented Big Sucker backing plate for incredible performance and clean style,our standard or SS stainless steel jacketed derby filter,custom trim ring and necessary hardware
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