FAST die-cast aluminum air cleaners feature a washable element and a functional, high-end design that perfectly complements the new FAST die-cast aluminum valve covers. With the exclusive FAST black wrinkle powdercoating and a machined finish, these air cleaners also weigh less than others on the market due to the use of die-casting versus the common sand-casting manufacturing procedure. The hidden fastener design features a single hidden bolt that is creatively covered with a magnetic FAST logo insert on top of the cleaner, as opposed to two-bolt designs that attach from underneath the unit. This means no visible bolts or cumbersome wing nuts! The FAST die-cast aluminum air cleaners are compatible with FAST and TCI linkage kits--ideal for both FAST EZ-EFI/EZ-EFI 2.0 throttle bodies and Holley-style carburetors. The units are sold with a reusable K&N filter.