91 drggn dime
+1y
it doesnt HAVE to be used in conjuction with a 4 link. You can use them in conjunction with a 2 link or a parallel 3 link and the only 4 link that needs one is a parallel 4 link.
A watts link keeps the axle centered while driving. if not then your rear end would sway all over the road. It is just a locating device. Same as a track bar or pan hard bar.