I thought about putting my RS on a diet for a while. Found a website (the address escapes at the moment) that listed the weights of many "removable" parts of the car. It included tar, interior lining, spare tire, seats, AC, blah, blah, blah... Anyway, I added up some of the stuff and saw that I could dump about 150 lbs. But if I did it, it would be a noisy two seater and not very comfy to ride in.