FYI... front grill block(s)... even with all this, I still have a hard time getting the water temp up to 190F! (according to the Scangauge).
Can see the foam between the slats of the upper grill and the complete block of the middle grill (below license plate). Only thing open is the very bottom grill (hard to see, but below the white part of the bumper).
As well, the 'oh-so-fancy' coroplast block on the driver side (hole needed so I can tighten / loosen the bolt holding on the bumper cover on that side) and the pink foam squished between the slats on the passenger's side