This clip secures your upgraded aluminum radiator hose directly to the sway bar.
A common upgrade for the 1990-1996 Nissan 300zx is to upgrade the lower radiator hose to a solid aluminum pipe. This upgrade at one time used to have a plastic clip to secure that lower hose in place but many people use a zip tie to secure it. The problem with this solution is that it doesn't hold things very tight, and doesn't look good.
This little clip is designed to go between the front sway bar and the lower radiator hose and securely snap them into place. A zip tie still secures it all together in the channel cut into the outside.
This design is sized for a Z1 Radiator pipe and a Stillen sway bar. If you don't have this exact equipment your fitment may vary.