Kuryakyn 9517 Black/Chrome Alley Cat Air Cleaner This cat is sure to make you purr! Great looks and outstanding performance, the Alley Cat is sure to turn heads.Kuryakyn combined their super high-flowing Street Sleeper&#174; II Air Cleaner with the new sleek Alley Cat Cover into one easy-to-install kit! Kuryakyn part number: 9517.