One of the coolest, simplest ideas for air filter kits today. Our innovative hi-flow 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.
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