Here is a thought.

Horsepower to weight ratio of the standard Crossfire is about 215 hp/3,100 lbs = 0.07 hp per pound.

Reducing 20 pounds of weight is the equivalent of: .07 hp/lb *20 lbs = 1.4 horsepower.

In other words, adding a whopping 1.4 horsepower would give you the same general performance advantage as reducing weight by 20 pounds (a good counter-argument here would be that every bit helps).

This simple analysis does break down and is not exactly valid for very dynamic events like road course/slalom tracking because the effective weight of things are amplified when they change direction in short periods of time...a good example of that would be a road course chicane (but it is still relatively valid, especially for small changes in weight like 20 pounds).

Considering that Carbon Fiber is quite expensive, going to Carbon Fiber has got to be one of the worst horsepower per dollar additions anyone could ever opt for. Coupling that with *my opinion* that Carbon Fiber is ugly makes Carbon Fiber a "will never even consider it" option for me.

Just my 2 cents and hope not to anger anyone...