i wieghed my car stock on a scale at 2,620lbs. Then i took out my back seats and my passenger seat and had a 1/4 tank and weighed in at 2,480lbs. Hopefully that should helpAnd by the way, i could tell a difference in speed!
I have done everything above including getting centerline wheels which are only 13 lbs each. Stock rims are really heavy. Removed the sound deadener in the floor, around 25 lbs. Added a rollcage that put back pretty much all the weight I removed. I weighed in at 2460 lbs with just front seats and 1/4 tank of gas so probably under 2400 lbs with less gas and removing passenger seat.
Use my philosphy. Do all the freebe weight reductions, and spend money on performance mods.That'll shave another 50-75lbs easy... of course you're also talking a few grand.