[Prostreet513]

Originally Posted by Mr.ac

Your overthinking this way too much.
Any amp/sub combo will be 100x better, and would work great with any stock unit.
I would put my effort in choosing the right sub box. If you mean this bad boy Amazon.com : Soundstream USB-8A 8-Inch Powered Subwoofer Slim Enclosure : Vehicle Subwoofers : Car Electronics then it would sound just fine.

Your still going to need a wiring kit. But you can always leave that behind.

Yes sir that is the one. I got it for $100 shipped. I could always do it behind the driver seat as well. Do you know if the stock pioneer touchscreen deck has RCA jacks and if I need a line level converter?