Sway Bar Set Performance Front and Rear 240ZST Suspension street performance sway bar set for Datsun 240Z 1970 73. 1" (25mm) front and 3 4" (19mm) rear. Includes all bushings and mounting hardware. This sway bar set is considered to be a street performance set. It is an upgrade over stock sway bars, but not designed for all out racing performance. Larger than stock sway bars will prevent the body from rolling as much in turns for better handling response.