The GKTech weld in traction arm plates have been designed to help brace the OEM traction arms. As the value of these vehicles increases we've seen the need to refurbish and improve some of the OEM parts rather than completly replace. Nissan obviously felt it was a good idea to reinforce the traction arms as they did update the traction arms with plates (similar to these) in the later model S-chassis'. CAD Designed CNC Laser Cut from 2mm C30 steel Vehicle Compatibility: - Nissan S13 240sx - Nissan S13 Silvia