It's been 5 years since I did this, so forgive me if my memory is a little rusty.
- Technic PnP Harness. This allows you to install an amplifier in your trunk and utilize the existing factory speaker wires. No cutting, no splicing.
- Tweeter sails (L&R).
- I went with Morel component speakers. They sound pretty good.
- I can't remember what I used for the underseats, I can look that up.
- JL Audio 500/5.
If you haven't done anything already, I can look up the part numbers & such.