I already have wires pushed through next to a drain hose on the passenger side. I need another descent size opening for the gauges I want to install, Autometer sent me those ***** gromets to use but I am not sure if there is one wall or two? Is the firewall, thinner in some places? Are there any other "Pre-made" openings? (sealed by honda), I am sure alot of you people have gauges! How did they run all the hoses for the gauges? Even if you don't have gauges, where did you run your thick *** 6 gauge amp wire through the wall? Thanks for all the help!

 

Usually under the steering wheel. If you look from the engine bay you will be able to locate the holes easier.

 

well, don't know what car you have, you didn't say, but on my EG, if you're facing the front of the car, look at the battery, now look about 3 inches to the right of the battery and down about a foot, there is a hole about 1" in diameter and is plugged up with a black piece of rubber, I have about 6 different wires going through there.

 

yeah there are a couple under the steering wheel you can go through