My stock firewall pass thru connector is full. I'm needing to run a few more through and think I needing to drill a hole. I'm trying to find a grommet that is weather-proof and having no luck. Do you guys know of anything? I was thinking of putting a hole right behind inner fender liner where the e-brake cable passes through. It looked easier to drill then another hole through the firewall.

 

Just curious what you are trying or wanting to run through there?? I am using reg grommets, that i have to lube the line up some to go through, but works great no issues what so ever..

 

I'm running a second wideband and it has a large connector on it. I'm thinking of removing the terminals to put it through the hole.

I've got fuel pressure wires, boost gauge hose, meth injection wires, and wideband through the factory pass thru now. The 2nd wideband wires are in tubing now which will be even harder to pull thru the factory pass thru.

 

I drilled the hole in firewall using an Irwin Unibit. I can't believe I've gone this long and never had a unibit until today. Wow that thing works awesome. Put a grommet in there and put clear silicone around wires to keep moisture out.