In preparation for welding in the new subframe connectors, Corey ground the front and rear frame areas to ensure a good weld. He also had to grind the powder paint off of the connectors where they would be welded. When installing subframe connectors, make sure you do it with the suspension loaded and not hanging. If the chassis is twisted when you weld on the connectors it will stay that way when you put it back on the ground. Not good. In this photo, you can also see the large void between the front and rear frames. This is the area that will be bridged by the connectors to help eliminate chassis flex.