I would suggest the foam is used to control air flow in the area around the radiator. Air is inherently lazy and will take every opportunity it can to sneak around obstructions, so the foam stops this. Do you need it?
Only Suzuki know how much its needed, but then they also dont fit things just for the fun of it.
On its own the lack of it is unlikely to cause problems, but the improvement it brings has gone.
I will be replacing mine using the Lambert "copy and tape" method above when it finally falls off.
Yokohama Geolanders, Sony head unit, NAUTILUS Air Horn, DRL conversion, Rear cargo space, Elvis Bobblehead, transfer Guard, Indian hanging Elephant, Koni Heavy track dampers, Custom SS exhaust, Voodoo Doll, Adventure Rack with LED ight bar, vintage ERIBA caravan usually attached (yes it's slow)
