Description

Replacement front gear case brass plug. This is used to plug the TOP sight glass window that ESS Tuning leaves in place, when they install a lower sight glass window when the rotor pack is flipped over. This prevents someone from accidently over-filling the supercharger to the very top window by accident. This is also used to delete the sight glass to prevent over-filling in custom applications.

It will also fit other applications, where someone may wish to plug the oil level sight glass, making it inoperable.