AtomicRC's Brand New MRZ V1.1 Exotic, Competition Race Chassis with these new updated parts and components...includes: New SIDE SPRING SYSTEM with new PROGRESSIVE conical springs invertively hooked...this greatly increases rear GRIP. New PIVOT JOINT for adjustable ROLL CENTER HEIGHT... for increased steering and quicker steering and rotation. New STEERING CRANK POSITION...with new ACKERMAN POSITION for smooth more linear feel. ATOMICRC...these guys NEVER stop making these venerable and fastest 1/28 scale competition race chassis!