Is this legal?

[nolongerracing]

Originally Posted by Ed Wright

As I said, the bar that bolts between the F body lower control arms is an anti roll bar. The bar running from the driver's side end of the rear end housing to the bracket on the frame, passenger side, prevents side-to-side sway. Some people tend to cal the anti roll bar a sway bar also. That is not accurate, but you go ahead and call it what you want.

Anti-roll, anti-sway or stabilizer (according to GM parts) are all the same. The purpose of the panhard bar (axel tie rod according to GM parts) is to only keep the housing centered in the car. It is not a side to side "sway bar". So if it came with an anti-roll, why can't it be replaced with an aftermarket unit?