Will this mount to my Forester without drilling into the frame?

Yes. This hitch uses factory-engineered anchor points on the 2019–2020 frame—no drilling or modification needed. Bolt it in place with basic hand tools and you're done.

What receiver size ball mount do I need?

This is a 1.25-inch receiver hitch, so any standard 1.25-inch ball mount will fit. You'll need to source the ball mount separately based on your towing load.

Do I need to prep or paint this hitch before installation?

The hitch ships ready to install as-is. If you want a finished look or added corrosion protection, light surface prep and paint or powder coat will extend its life in wet climates.