6.0 LITER TURBO DIESEL. Indicator grommet. A rubber ring with a hole in the center which provides protection through which Air Filter Restriction Gauge related components pass through. A rubber ring with a hole in the center which provides protection through which the Mass Air Flow Sensor or a part of said component passes through. Air Filter Housing Gasket. Flow. Housing Gasket. Indicator. Included with: Air cleaner assembly.