Besides rims / tires / driver, what's the best bang for bucks to lose some weight on the car?

Seats? Full Ti exhaust? (both are not cheap!)

No cheese on your Whopper

I don't know your driving style or what your car looks like, but after 10 years you still have an interest in modding!? dang...

If you are keeping this road warrior on the main streets, when is exhaust ever going to be cost efficient? You could look into test pipes to save some weight. Seats are not too bad on price and OEM seats are granite rocks compared to them.

The OEM seats are really, really heavy. You could probably save the most weight in one shot...

Yea ^ seats, but don't forget everything in your trunk too!
Gary

Take out your spare tire, that'll help.

Gut the interior.

Buy a lighter car if thats your goal? Gs are porky.