My first car was 89 teg LS. It Handled great, was a blast to drive. As for after market stuff, I had to make my own parts!. There wasnt any inakes availible for it at the time, so I made a quick trip to home depot, and used PCV pipe, and slipped on a K&N on the end of it.

I also gota local muffler shop to cusom bend me an exhaust.

other than that nothing really could be done to it. The suspension is very similar to 88-91 CRX and Civic SI. You can always swap an engine, but im sure the engine prolly costs more than the car itself. Good luck