Absolutely. You must have an airtight seal for the sub to work. It works kinda like a drum, if air goes past then the "thump" won't be there. Make sure the screws go all the way in, and also check to make sure they aren't stripped out. Good luck.
Scott
Mabe I WILL be Phil.
1999 Contour SVT, Tropic Green
BAT kit, K&N RU-3530+MAF, Magnecore 8.5mm, some audio goodies, Hightowers, Knauberized, tatoo by Parkedcar.
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