These differential plugs are designed to replace the factory fill and drainplugs so that remote oil cooler lines can be run to the differential.
Instead of drilling, tapping, threading a factory or aftermarket differentialcover to run additional lines, you can now use the Rogue Engineering plugs,drilled with a 1/8 NPT thread. This allows for the use of commonlyavailable adapters and fittings to be used.
Sold as a pair, includes copper crush washers.