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      02-10-2013, 05:11 PM   #15
Alex@ONEighty
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Drives: E93 M3
Join Date: Jul 2012
Location: NYC

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The shark fin is held into your roof with a type of adhesive very similar to urethane glue. You need to cut it out very carefully not to a scratch anything. The fin is plastic and under it is the actual antenna which is screwed on with a single screw. I think it's a T27 or T25. We have done a few of these and it requires patients and I recommend it should be don't by professionals.

I'll make a video next time we do a roof and post it up.