A French guy named Panhard (prounounced pan-ard), invented that particular suspension piece. Lots of people call it pan-hard but they are mispronouncing it. Whatever you choose to call it, a Watts (invented by a guy named Watts) linkage does the same thing, but does not follow the arc of the one piece Panhard bar, so is probably better if built properly, but only a minimal difference in handling. Formula 1 cars use the Watts, since they are dealing with small portions of seconds per lap so a little is a lot, and the money is HUGE so cost is not a consideration, since the Watts costs a bit more than the Panhard bar (O.K. call it a Z bar or whatever), on a street driven car it would be hardly noticeable.
