Each hidden breather is O-ringed at the heads, passes through the backing plate and exits at the mouth of the throttle body through proprietary shooter tubes eliminating the need for any external hoses or hardware Features Arlen Ness Big SuckerÖ breathing technology Backing plate is CNC-machined from forged aluminum Air filter is reusable, washable and does not need oil Radius air inlet provides unobstructed airflow Synthetic air filter is handmade in the U.S.A.. AIR CLNR RND BLK 88-20 XL
