Ness-Tech Stage I Chrome Big Sucker Air Filter Kit w/ Chrome Backing Plate. Ness-Tech Product 18-501.
Source: Custom Chrome
All-in-one aluminum backing plate features built-in carb support. Breather tunnels at each head to decrease crankcase pressure. Accepts all oval or round Original Equipment outer air cleaner covers. Includes the backing plate, high-flow air filter, four chrome banjo bolts, and all necessary hardware.