[Aaron407]

I'm considering adding a Fumoto F137S drain valve to my oil pan, but it looks like this new version has a larger body. Does anyone know the largest head diameter that the early GT oil pans can accommodate? The top area of where the drain plug normally seats is a bit inset, so I'm curious what the factory drain plug head/flange diameter is and/or what diameter the pan can accommodate to confirm if the F137S will work without an adapter.

Any thoughts?

 

[JCMG8]

I've run the Fumoto in the past, works well. Once added power, I changed to a magnetic plug and used a OTC 5911A tool to keep from the arm bath.