I have zero concerns with overheating, I run a vinyl number plate on the front wing so no number plate box, and if anything my deeper and far more efficient SiFab aluminium radiator over cools.
Once it enters the grill and is in the void behind it the airflow only has one place to go, horns or no horns it's got to pass through the rad.
Dave.
+1 SiFab Aluminium radiator
