A lot of weight like 200kgr??? Because rims apart (rays are perfectly light) i cant see how you can get the coupe below 1500kgr. Thing is you still want a car drivable every day. you need the air con and the stereo. oh and the door panels. Then add roll bars, thicker sway bars, heavier brakes, bracings, even the adjustable a-arms are heavier than the stock ones. grrrrrr