but in all seriousness

1. Make cold air kit out of some chrome exhaust stacks laying on our farm (make it 4 inch...with the looks of this list i could see you making a 2.5 inch intake )
2. Get rid of old muffler and put on a glass pack (sounds ****ty)
3. Install turbo simulator (gay, ricer, mine as well make noises out the window with your mouth lol that how stupid it sounds)
4. purchase new spoiler seen here: Custom Style - Lighted Rear Wing - 2006 Pontiac grand prix spoiler (decent...i guess)
5. paint calipers (already have duplicolor red caliper paint in my trunk) (the one thing i like )
6 install some custo Grand Prix SS emplems on the door (uhh...no... gay)
7. maybe a chrome mesh grill or something (your other good idea)

basically do only 5 and 7.....maybe 4 if you dont wanna be on sabrewings gheytometer....and shy away from the ricer look....