Subframe Connectors

That is how I understand it. Being that the unibody will flex a lot, anything that helps stiffen the chassis is a plus. Considering the length between subframes, this can be a lot, all of the will bow and twist under hard forces. The better connected the frame connectors, the less flex there will be on the floor and the entire car. The less flexing, the more power you get to the wheels. More flexing, less power. It just gets wasted.

The only thing you can do better is to introduce a full frame or and entirely new chassis to put the body on. For us regular guys, if you can run or tie the frames right through the floor and then weld it together as close to as a singular piece the better.

A flexing body is your enemy and a waster of power.