Quote Originally Posted by Keel056 View Post
Couldn't a person just cut the grid heater grid out of the stock plate and reinstall it?

Looks simple enough, and then just drill and tap the air horn for the aftermarket screw heater.
Yes, you could do that.

The grid heater electrical connection bolt would still be in the plate but not used.

Depending on the location and type of aftermarket heater used, you may still have the possibility of parts entering the intake plenum should the heater fail.