Audio Upgrades
My stereo system is my favorite part of my car. It makes me want to just drive around all day.

Two JL Audio 12" subs in a custom designed and hand fabricated box, sealed air tight.
My Head Unit: Pioneer Premier
For my money, nothing can outperform a Pioneer head unit.

Also, not pictured:
Rockford Fosgate 6 1/2" component set in the doors.