Air Filter Service Indicator for all SSDiesel Supply's^TM Performance Air Induction Systems.

Indicates "green band" when filter is clean, "orange band" when needing service. Color change shown in photos. If ordered with the Induction System, it will be pre-installed. But can be added easily to ones already in use, by removing the assembly from the vehicle and drilling a 1/2" hole anywhere of convenience in the rubber elbow, then just push in place.