Sway Bar Set Front 28mm and rear 22mm ST 260Z 280ZST Performance sway bar set for front and rear of Datsun 260Z (8 74 up) and 280Z, 1974 78. ST sway bar set includes front bar with all mounting hardware in 1 1 8" (28mm) size and rear bar with all mounitng hardware in 7 8" (22mm) size. These sway bars are considered to be for street performance or mild track use. Larger than stock sway bars will make your cars handling tighter by swaying less in turns. * The 74 260Z used a different rear bar dependind