Originally Posted by luan87us
I think the stock wires in the wrx is 16-18. Which is fine unless you're pumping 1000watts around them. I forgot to mention the reason it heats up because a lot of wattage going through the small wires. I'm planning to re-use the factory wires if I upgrade my stereo system. Although I'm not going anywhere past 500watt-600watt so it shouldn't be much of a problem.
I guess you plan on doing it like I am. Just running amps under seats and the speaker wire to the after market headunit harness to the speaker