Black anodized Slot Track outer cover. With black backing plate. Air filter element pre-oiled with red oil. Engineered and proven to give your engine maximum airflow for more horsepower & torque. The patented hidden breather backing plate is O-ringed at the heads and exits inside the mouth of the throttle body for a virtually closed loop system; eliminating the need for any external hoses or hardware. - Increases horsepower & torque - Patented hidden breather technology - Pre-oiled high performance cotton gauze filter element - One-piece aluminum backing plate - Radius air inlet for unobstructed airflow - Includes gaskets & installation hardware kit - See 936616 for the optional replacement gasket & installation hardware kit