I have also done a lot of weight reductionfull A.C removed, full sunroof assembly removed, all of my evap system, full rear decking (custom build rear strut bar), full back seat removed (but still able to re-install rear seat), full glove box, passenger air bag, driver air bag, center console, head liner, rear carpet, rear pillar liner, spare tire well removed, and lastly I trimmed out 18lbs of small metal from various places.my goal was to get the cars weight down to between 2500-3000 lbs with me in it and half tank of gas, I got the car down to 2838 lbs with 1578lbs in the front and 1260 lbs in the rear of the car and I still need to put a light weight battery and remove my fuel tank and install rear fuel cell to help even out the weight from front to back.Rear diffuser built and installed Really cut down on how lose the rear felt after all of the weight reduction because of wind turbulence catching under the car where my spare tire well was and mufflers were after removing them it left a 3x4 and 2x3 foot hole for wind to catch.