Features: Features a billet aluminum backing plate with hidden integrated breather system and a plexiglass outer cover. Snap-in velocity stack for improved airflow. Dyno developed and tested. High-flow air filter is reusable; just clean and re-oil. Made in the USA. For Twin-Cam Throttle by Wire with EFI only. Optional velocity stack part # 1010-2218, upgrades stock opening to 58 mm..
