Aluminum T419 chassis with special cutout openings for increased flex. Redesigned to accommodate the T419 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 - Aluminum Chassis works better.) This aluminum 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.