Thread: Running wiring through firewall

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If your firewall is 'glass, and if you can shove the wires around a bit plus protect them with some good tape, you might be able to get a file in there and enlarge the hole for a split grommet. You can thin down a file and remove one side of the file teeth on a grinder. I grommeted mine plus added this from Watson's Street Works(http://www.watsons-streetworks.com/aluminum_trim.html)

It's kind of PITA to install - I made up studs instead of using their machine screws and made a steel drilling template based on their paper version (which is off a bit dimensionally)