I have a 2003 Celica GTS. Half of the long thin grill opening above the front License Plate
is covered by Styrofoam on the drivers side. I have read that this Styrofoam serves the following functions:
1.Energy absorption in case of impact.
2.Structural support for the vinyl plastic front fa ade. (Removal is said to cause droopy front bumpers.)
My speculation is that the Toyota engineers may have decided to cover the half of the grille on the drivers side as a preventative measure against water being sucked into the air Intake
which is just a few inches up and behind the Styrofoam blocked side of the grill.
I am contemplating cutting holes in the Styrofoam to get more of a RAM Air effect, but I am trying to calculate the hydro locking danger potential in doing so.
As a preventative measure to this potential MOD I am thinking about cutting a foot long length of PVC pipe in quarters and using one of the curved pieces as a sort of downward deflector that will still let air in.
I am already using the TRD
high flow K&N type Air Filter
It would be great to hear some input from some experienced Celica owners.