Which wheels do you have on it now?
The Pontiac Torque-Stars that came with mine are beautiful, but I'm looking for TorqueThrusts.
As for blue bulbs in the lights, trust me and the other BC members who already said this; buy Sylvania SilverStars
. They're an ultra-bright white bulb, much better than blue for night driving. Besides, the blue-headlight thing is kinda running it'* course, I'm not seeing near as many as I did just a few months ago...
You're already taking care of the exhaust, so your next step is a cold-air intake
. You can buy a cheap one that will work just fine from Auto-Zone(meant for a Civic, but with tweaking will fit a Bonnie), or you can go whole-hog and order an airbox from INTENSE.
As for audio; do you have the 8-speaker system, or the base 4-speaker?(If you don't know the difference, just look at the front doors, do they have 1 grille or 2? If 2 it is the 8-speaker)You've got an excellent car there, treat her right and she'll last for a long time.
And you'll LOVE every minute of her life!