My truck sat up a couple years with a bad engine. Needless to say I should have pulled the subs out and stored them indoors, but I didn't. Once I got the truck up and running I went cruising and flipped on the amp... after a couple minutes it sounded funny. So I take a look and the foam ring was shredded and mostly laying in the floor. I found some re-foaming kits on ebay to replace it.... suppose to be as good as the original factory foam. I have honestly never heard of re-foaming a speaker, so I'm hoping someone here has some experience with this as to good or bad results. Thanks