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 Breathing system eliminates oil issues associated with the M8 engines by directing any excess breather oil back into the engine Kit includes one-piece backing plate, breather tubes, performance filter, filter top, gaskets, oil reservoir and necessary hardware High performance filters are made from black pre-oiled cotton for the best in airflow and filtration Hidden breather backing plate technology is a step up from the original 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. BIG SCKR STG1 STEEL CH M8