The JR-LB08-GU replaces the original servo saver and tie rods on the Tamiya CW-01 (Lunch Box) chassis with machined aluminium components intended for improved steering control and workshop tuning.
The kit centres on a 25T spline hi-torque servo saver matched to aluminium tie rods, providing a firmer mechanical path from servo to steering knuckles and limiting flex during cornering and repeated runs.
Installation follows the usual Lunch Box procedure: remove the factory saver and tie rods, install the aluminium saver onto the 25T servo spline, and attach the tie rods to the steering arms using the existing ball studs or links. After fitting, check spline engagement and steering travel to ensure no binding occurs.
Tuning advice: aluminium tie rods enable stable toe and trim adjustments, and the metal saver keeps servo feedback crisp while resisting wear compared with many stock plastic parts. This upgrade suits hobbyists seeking a robust steering interface for regular practice or entry-level competition.