[quote=spdrun]Drill two holes, one for a Tygon hose attached to the nipple, one about 2″ dia, bit enough to operate the valve.[/quote]
Then, what’s the point of having underbelly pan? The purpose of it can be for aero, airflow, or simply protection from soot on the ground. Plus using a valve has two issues. 1. They can fail.
2. Being that part of the thread remains in the pan, depending on the angle of the drain plug, you aren’t really going to drain the tiny amount of oil still stuck at the bottom of the pan.
You really aren’t saving that much time between unscrewing a drain plug and using one of these valve-based drain plugs..