• Each breather is O-ringed at the heads, passes through the backing plate and exits inside the mouth of the throttle body through proprietary breather tubes
• Kit includes one-piece backing plate, breather tubes, performance filter, filter top, gaskets, oil reservoir and necessary hardware
• New patent-pending hidden breather backing plate technology is a step up from our original patented system
• High performance filters are made from black pre-oiled cotton for the best in airflow and filtration
• Smooth radius air inlet for unobstructed air flow

Fits: 1999-2015 Twin Cam (Except 99-01, 08-Up FLT)