Old school steering stabilizer

These were somewhat useful on 4x4s but should NEVER be needed on a passenger car in normal driving. If you think you need one, you need to look for the "real cause" --loose / worn parts, etc.

I agree with Red on one point -- if you have a 'driver' (thinking more "back then") and lived on a terrible road, it might be of some benefit.

Yeah, I know all about "washboard" roads.