Kleinn Air Horns HOGKIT-1 Direct Drive Horn System Expertly Engineered for most Harley Davidson Motorcycles from 1978 to Current Offering a One Hundred Percent Bolt On, Direct Drive, Dual Air Horn Includes a Powerful, Compact, Tank-Less Direct-Drive Compressor Featuring a Custom Bracket Proudly Made in the USA Includes Instructions for Wiring, Relay, Air Line and Required Hardware