bigkevy Posted February 22, 2011 Report Share Posted February 22, 2011 hello im building my box for my subs. im working on the trunk section right now. i noticed, of course after i started gluing, that the inside of my box measures about 43.5". the outside of my port measures about 42", so i have about an inch gap on each side. i figured i would just put some kind of filler in there to strengthen it up a bit. should i use that great stuff expanding foam? or i think i have seen people use fiberglass resin too. anybody have any ideas? 2007 mustang Boyo avn701d hifonics bxi2610 2 olm 2415s hifonics 100.4 2 infinity 6x8s 2 kicker comp cvt 8s Link to comment Share on other sites More sharing options...
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