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397 Posts
These type of grommets are really good. Cut the hole to the appropriate size, prime the bare metal, and install.
4 Cord Grip 2/0 Gauge Grommet Firewall Bushing Car Audio Power Wire 1'' Hole: Amazon.com: Tools & Home Improvement
4 Cord Grip 2/0 Gauge Grommet Firewall Bushing Car Audio Power Wire 1'' Hole: Amazon.com: Tools & Home Improvementwww.amazon.com
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