I have had my '95 Probe GT (automatic) for 126,000 miles (bought it new!), and really enjoy it. It gets decent mileage, has decent pep, handles well, and hasn't caused me many problems. Although I'd love to get a new Mustang, reality says forget it. So, does anyone have any realistic & not outlandishly expensive ideas on how to give my Probe a little boost in performance?

What kind of performance boost are you looking for? A major power addition or just bolt on parts to give it an extra kick?