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      12-27-2009, 12:32 PM   #14
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kmarei's Avatar
Drives: 1988 E30 M3 Evo II
Join Date: Jul 2008
Location: Reston, VA

Posts: 6,481
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do you need to use silicon or window foam tape to seal them?
or is the spacer all you need to make it air tight?
isn't the spacer made of a harder material?
how can it seal correctly?