I took a peek at my 6x9's yesterday and I was kinda suprised to see some sort of enclosure made out of a sound deadening material behind them. Is this something that the previous owner did because I don't remember seeing this stuff on my 88 bird.



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1991 Firebird Formula
305 TPI,Auto,Custom 3" Mandrel bent I-pipe, Flowmaster 80 series muffler, 3" hi-flo cat,Taylor Spiro Wires,Bosch Platinum Plugs, K&N Filter, Grant GT Steering Wheel, 5% Rear tint, Pontiac Windshield Decal, Fresh paint

Check it out https://www.thirdgen.org/rides/index...ew&rideid=1074

 

my 88 camaro has that ish in there as well, i suppose its just some type of sound deadner or acts as a fake enclosure or something.

 

That stuff is good leave it in there, GM started putting it in 88+ F-Bodys to deaden road noise/body rattles from the sound system. I have tried my 6x9's with and without them, it's better with them but to each his own. Just be careful removing them because there hard to come by and ne from GM there $75 each.(for that stuff its crazy)