i have searched but not found any definite answer, so my question is if i purchased a manifold with a hole drilled in it for the egt probe, but have no egt probe, can i still run it with the whole open or should i plug with something and what?

 

you need to plug it

 

u would def have to plug it...a leak that big would make it very hard to spool up the turbo

 

I third the plug the hole. Don't be lazy. Just plug it.

On another note why did you even ask this question. This is pure laziness.