Determine if you want to install the Box Plug (19) on the Airbox (8) or install the Base Scoop (18) on the Airbox (8). If the Box Plug (19) is desired, simply install the Box Plug (19) in the opening on the box, otherwise, install the Base Scoop (18 ) on the opening on the box.
When should I install the optional box plug?
Depending on your airflow requirements, you can gain increased airflow by removing the optional box plug. We recommend removing the plug if your vehicle has other performance upgrades. Keep in mind that you are exposing you filter to more dirt and bugs therefore your filter will need to be serviced/changed more often. We recommend in warmer temperatures to keep the plug installed to keep out excess engine heat.