Agee, that is one thing on a long list of things people keep telling me is wrong with my car. I supposedly would be faster. With a Firebird rear hatch than the Trans Am hatch/wing it came with. The wing on mine, I'm told, weighs 30lbs? But, it is on the rear of the car. I have not found anybody that has tested that on one like mine. If somebody knows for certain I would like to know. Angelo??