Is there any factory holes in the firewall to run a 4 gauge wire through or do I have to drill a new one??? Where is the best place to drill if I have to???

 

I found a nice white plastic plug on the drivers side almost behind the batter. I drilled it with a hole for the wire, and then used a grommet and a little silicone seal. Nice becuase should you remove the system at some point you can get get a new plug and replace the old one.

 

Yep, that plastic plug is so big that you could fit 0 guage thru it if you wanted to

This car is just meant for car audio freaks. The space in the door sills for hiding cables and the amt of room under the seats for amps... it's just perfect! Well, except maybe the door speaker placements could be a little better.

 

I believe that the white plastic plug you guys are referring to are only on the automatics. The clutch pedal assembly passes through this hole on manual transmission cars.

 

Yeah that white plug is full on the manuals. I couldn't find anyway to go through on the drivers side. I managed to stuff 1/0 gauge through a hole underneath the glovebox though in my p5.