The lightweight chassis is CNC-machined from premium Swiss 7075 T6 aluminum, strategically machined in low-stress areas to make it as light possible without adversely affecting strength or rigidity. Features holes for mounting the redesigned back bulkheads which are the the main backside flex suspension system system. The framework can be updated to work well with redesigned rear hands. Larger back window opening improves traction and increases stability associated with automobile.