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

11-22 5.0L Mustang, F150 Full Gasket Set, 2.9L 175FF/175AXF Jackshaft supercharger
Whipple Front Entry Single Bearing Drive Rebuild Kit
Supercharger Needle Bearing Grease
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Rebuild Kit for Head Unit only W3A, W4B, AXM, 140AX G3, 175AX G3, 175RF, W185AX, 200AX, 210AX, W235AX, 245AX, 275AX
Whipple oil drain plug
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Carbon fiber coupler 22mm thick (Whipple style) 