This is a great product to make installing your Oil Pressure and Oil Temperature senders easy. This plate screws on under your oil filter and it has??4 1/8"NPT fittings. So, no more drilling and taping holes. Just unsrcew your oil filter, screw the plate down in the same manner as you would install your oil filter, and then screw your oil filter back on and install our Oil Pressure or Oil Temperature senders. Comes with 4 plugs and instructions. The plate can even be rotated 360 degrees give you the most room to install the senders.