The S4-018A is a 4mm graphite rear shock tower intended for 1/10 scale YZ-4 series touring car chassis. It is an RC-scale replacement part that locates the rear shock mounts and contributes to the chassis' roll stiffness and camber behavior.
Fitment follows the supported chassis codes listed in source material, including B-YZ4SF and YZ-4S variants. When replacing the tower, confirm mounting hole alignment with your existing shock tower posts and hardware, and reuse original six-point fixings where applicable to retain geometry.
Use this graphite tower to adjust rear roll characteristics and shock mounting options as part of chassis setup and suspension tuning for 1/10 scale touring RC cars.
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