HPi's External Breather system is an add on feature manufactured to fit the HPi V2 and Billet-Pro air cleaner kits. The design helps eliminate oil misting on bike and contamination of intake tract with a fully o-ringed system, billet stainless steel inserts and vacuum tube design. Purpose built to retro fit other select air cleaner kits that use a flat mounting back plate. Allows for a slight misalignment of air cleaner due to head/throttle body fitment issues.
*Please note, not yet available for Sportster® units.  Fuel Injected models only.