Not for the faint of heart, our Skull Air Cleaner Kits are a vile & sinister addition to any ride. The outer cover is a high-strength, extremely rigid composite material, chrome-plated for killer good looks. These kits are complete with a K&N high-flow filter element as well as any necessary brackets & hardware required for quick & easy installation. Carburetor re-jetting is required & the necessary jets are included for your convenience.