The reason for the foam is in the hoods design. Thats a cheap aftermarket hood. There is a top piece and a bottom piece, they are glued together. It's not solid SMC like OEM.
Being how it's two piece there is a gap between the two pieces, the hood will not have a sealed duct from the scoop to the front of the airlid. When air goes into the scoop it leaks out into the entire hood. This can be tested with water, an OEM hood will direct water from the scoop to the front underside. This hood will allow the water to go into the scoop and leak out where ever.
Not that any of this matters, I just had one of these and traded it away because of the poor design.
__________________ 2001 Z28
Full exhaust, FTI 3400.
12 flat at 112mph. |