[robnolimit]

probably not. Cost-vs-gains may not be worth it for the marketplace. For the street, I doubt there would be any noticable improvements, remember, only 1/2 of the arm is unsprung weight, 1/2 must be counted as sprung weight, as it is mounted to the frame. The same is true with the shock and spring, the weight is split 1/2 and 1/2. It's out on the end, the spindle, rotor, caliper, and wheel and tire, thats where the gains can be noticed.