I wish I could....
put a retractable antenna on the car.
Pulley for more horsepower.
Headlights styled like the new ones.
A force field around the car to block rocks, door dings, dust, etc. LOL
Wish I could figure out how to make my phone work!? ARG!
Find a "Free", LOL, original CD changer. (Mine was missing when I bought it.)
Ahhhh.... maybe someday....