ASUSMC

I got my boost and A/F gauges. I plan on mounting them on the A-pillar and have the pod. How do I run the tubes and wires through the firewall. I didn't see any holes. On my dads truck we just ran them through an existing hole. Is there one I can't see? Do I need to drill one?

mustang_montana

there is a grommit back behind the fuse panl in my car, pretty sure youll have it to as the instructions i had were for a 99+. its a huge grommit with a bunch of wires going through the firewall, get a razor blade and trim it a bit, and then you can run the vac line through it. i fit a batter wire, vac line, and 10 gauge elect wire through it so youll have plenty of room.

ackuric

Abovewhere the steering wheel goes through the firewallon my 99 mustang I had a rubber spot on the firewall, with a quarter size indent looking like it was meant to be penetrated, so i penetrated it, that was for my 8 gauge wire on my amp to battery. All I had to do was slit it with a razor blade, and slip the wire through, even seemed air tight, so I didnt take any extra effortto seal it