Where did you run your wire through your firewall to install the amp on a 1990 maxima? I have been searching like crazy and cannot find one. I really don't want to drill if I don't have to, but if I do, where do I drill? Thanks.

 

There's a rubber boot/grommet on the center right part of the firewall just behind where the oil filler tube is it's about 10" or so down from the top. It's easy to poke a hole in that grommet and run up to a 2G power cable into the same space where the engine management sensors come in and feed the ECU.