Ideal for racers looking to upgrade key drivetrain and suspension components, this kit includes a selection of high-quality aluminum parts that are also available individually, making it a convenient way to overhaul multiple performance aspects at once. About the Aluminum Conversion Kit. With a focus on improving steering precision, suspension control, and drivetrain durability, this kit equips your TT-01 with a solid foundation for both casual driving and track performance. The aluminum lower arms, hubs, and knuckles enhance overall suspension response and provide a refined, race-ready appearance. Aluminum universal shafts provide smoother power transfer and reduced flex. Precision-machined aluminum steering arm and bellcrank set enhances steering response. Aluminum front knuckles offer better durability over stock plastic components. Rear aluminum hubs improve suspension alignment and offer long-term reliability. Greatly enhances overall driving stability and precision. (4) Steel Front or Rear Differential Outdrives. (4) Pre-Assembled Aluminum Universal Shafts. (1) Pre-Assembled Aluminum Steering Arm/Bellcrank Set. (1) Aluminum Front Lower Arm Set (Left/Right). (1) Aluminum Rear Lower Arm Set (Left/Right). (2) Aluminum Front Knuckles. (2) Aluminum Rear Hubs.