4 link question

The function of a four-link is to keep the rear axle in its proper place under the vehicle, even under hard acceleration or cornering. The bottom two links keep the axle in place front to back. The upper two links keep the axle from rotating and keeps the pinion angle constant. In a triangulated four-link, the upper bars also keep the rear end centered under the car so a Panhard rod isn't needed.

The RMS Street-Lynx is a triangulated set up. I have the RMS under my car but not on the road as of yet. Everyone that I have spoken to with this set up is all thumbs up.