-Spare tire - 30,1 lb/13,7kg
-CD changer& amp - 7,3 lb/3,3kg
-Carpets & wooden panel back trunk - 13,6 lb/6,2kg
-Carpets & plastic cover brake fluid
front trunk - 6,8lb/3,1kg
-Towing lug - 1,2lb/0,6kg
-Glove compartment behind seat/engine - 4,0lb/1,8kg
-Cutted off carpets just under
both seats(no sound difference) - 4,6lb/2,1kg
-Spare tire changer - 2,9lb/1,3kg
-Your girlfriend - 132,1lb/60,5kg
And yes, i feel the difference....
Carpet behind the seat and engine cover - 24,2lb/11,0kg
That will make very noisy inside with top on, with top off no sound difference.
Some other:
Sports exaust
AC removal
Lighter battery
Underdrive Pulley