Remove the airbags, the steel bar inside the doors, air conditioner, window mechanisms, headliner, carpet (trunk too), turn signals (nobody uses them anyway), headlight switch (you have DRL's just leave them on), reverse lights (you can't see backing up anyway), catalytic converter, mufflers, the foam behind the 2.5 mph bumpers, you only need 3 lugs on each wheel, put helium in your tires....