I've been doing alot of research on modifications needed for a high horsepower build and came across thread in freeze plugs under the valve cover.

Is this a thing that is needed? And how often does failure happen?

I'm very curious to know how much horsepower and RPM is needed before there is enough heat/pressure and water pressure from the water pump to cause the press failure in plugs.

If anyone can shed some light on this subject, I am very interested to learn.

I am doing a hot street build.

Is this necessary for the street or left for drag/sled pulling only?

Ive noticed all the fleece heads they offer to have, but is it a gimmick?

I appreciate any help you can provide.