If you drive a car and want stiffer steering response or better handling you might want to read this.
In your car there are two pieces called the frame and the subframe. To cut costs and manufacturing time, car companies are using thinner bolts in the parts that connect the frame and subframe which means that each bolt has about 2-4mm of play, depending on the manufacturer. For everyday driving, thats really not a big deal, but if you're interested in heading out to the track or just want your car to handle better and don't want to pay the premium to have the two parts welded together, there is a solution!
A japanese company makes these things called "rigid collars," which fit in between the frame and subframe and stiffen the connection so there is no sliding around between the two. It eliminates suspension "wobble" and gives your suspension a more firm feel.
Here is a video to demonstrate what it does