perryinva

Took apart and cleaned out my airbox & TB today. Tookout that crazy foam thingy and it's bracket in order to clean it but the foam was crumbling some so I left it out. What is it for? Noise? water absorbtion?

CosmosC4S

I asked the same question before, and I think someone said it was for noise dampening.
Mine was turning bad as well.

jlrolivo

I cleaned out my airbox as well. Needed to vacuum out the deteriorated foam. Can't seem to find replacement, unless I buy entire box. Also, not thinking it is needed....Thoughts???

dan_189

I dont think it's needed, older air boxes don't have it. From memory it's an 03+ thing

Fracture

same here, it was crumbling

intact but when you touched it just fell apart

the consensus is that it's primarily for moisture
I'm going to try and replicate mine from thin foam
as I threw a P300 code after a hand wash

Noz1974

It's supposed to stop the chance of water being inducted into the cylinders causing a hydro locking situation but I know what you mean about it crumbling , I had this also and can't find s replacement part, if anyone had a part number for this and someone who sells it please post on here!!

Chicago Pete

I remember someone replaced theirs with one of those green scotch brite pads.
Seems like it would work?