Cooling air inlet duct opening.

[Flyboy66]

My cowling has a ridge glassed in (from factory) that is about 1/2” tall and is below, or maybe below and behind where the radiator will be located, and goes across the bottom where it is flat. I suspect it is to address that issue. Does your cowl have that?

I glassed in the duct, and will be laying strips over the edges of the duct extending onto the cowl.