John- They may very well be for balance. I have been to several speed shops in my area and every one of them recommends the Centerforce clutch set over the OEM of any brand. They think they are great. Unfortunately, if you ask them why they are so great...no one seems to actually know. One guy claimed the weights use centrifugal force to enhance the engagement of clutch to flywheel contact, another said they were for "dynamic balance" and yet another claimed they assisted in the disengagement of the clutch to pressure plate. I personally think that none of the above is correct. I will look up the patent claims over the weekend to see just what the novel feature of the clutch weight really is. Regardless, the proof is in the performance and I can't detect any. (at least not in a Delorean) Perhaps if the Delorean had a bit more testosterone in the engine department the improvement may be more evident. Actually, when you think about it, installing a competition clutch on a car that can't really jump off the line is somewhat like putting mag-wheels a lawnmower if you know what I mean. In any event, the performance characteristics of the PRV-6 indicate that the OEM clutch is probably more than sufficient for the task at hand, rendering any further design modifications superfluous. (with the possible exception of improved material components) That's just my two cents. Rustproof vin 1559