3M Automotive Mounting Tape

RonRizz

I just used a roll of 3M #3614 Heavy duty for some vent visors on my crosstrek. Ridiculously strong tape, and I have no doubt it would hold a speaker in place. How long is the question. weather, along with constant vigorous vibration may not be too kind to it.
Use screws/ bolts like everyone else. Don't try to reinvent the wheel.

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