Aluminum T4’19 chassis with special cutout openings for increased flex. Redesigned to accommodate the T4’19 front chassis brace. The front brace – which can be easily installed on the chassis with two screws – eliminates side flex at the front of the chassis, improving steering response and making the car more predictable. This chassis is recommended for and works extremely well on medium-to-high traction tracks. (Not recommended for very-high traction conditions where the #301149 - Alu Chassis works better.) This alu flex chassis generates more traction and makes the car faster and easier to drive. Successfully raced by the factory team, this is a “must have” for every serious racer.