This air cleaner is designed to bolt on to Super E, CV, Bendix and HD EFI bolt patterns. The outer cover is styled after the HD "j-slot" knucklehead air cleaners but it's been reduced to a 5in diameter and slimmed to only 1.25in thick. ̴Ì_ Machined out of 6061AL and polished to perfection. Features a washable high flow UNI air filter element. ( linkert adapter is coming soon. ) Carb Support Bracket is needed for CV applications.