You can go to any truckstop and scale your car. Most you will have to pay the scale fee which is usually between $7-$10. The attendants dont care, as long as you pay.
My buddy Sam and I weighed our cars at the Flying J in town and it came out as 2240 for his car and 2480 for mine. Full tanks and spare and jack in and without us in the cars. A few reasons why my car is so much heavier are I have a Sterling, and if you've ever picked up a Nikki you know they are rather heavy, and he only has ITB's which are fairly light. I have a full RB SP dual exhaust, whereas he has an SDJ header and thin piping. His car has most of the useless wiring stripped and I don't. He has the RE-Speed R&P kit and I still have stock steering (not for long though
). He has a Mariah front bumper which requires the removal of the stock steel bumper in place of a thinner, smaller metal frame. Mines stock. I also have a Rockford 400 Watt amp and he is using one or two much smaller amps and no rear speakers.