Foam function :-

1.Reduced / insulate heat from front engine bay.
2.Keep away nyek!nyek! sound from any assemble part / plastic in ur car.
3.Trap the sound (ice)/aircond cycle in ur car with out expensive accs.
4.Door will be smooth /tough when it open or closed.
5.Reducing noisy from outside.

my car has those nyek nyek sound whenever on rough surface or go over bumps.

usually these sound came out from where??

also, whenever raining. my car roof can hear rain sounds too. 

if this foam helps, i'm interested to buy from u.

need advice from you, pm me ya.

thanks.

btw my car is swift.