This part replaces the bearing at the rear of the upper deck to lock the deck more rigidly in place and raise torsional stiffness. It is intended for use in hobby-racing applications on BD11-family and compatible MSR chassis.
With increased stiffness at the rear upper-deck mount, the chassis can resist rear droop under lateral load, helping deliver a smoother and more predictable turn-in on tracks prone to rear grip loss. Note that this item is a tuning aid; its effectiveness depends on the full chassis tune and driving conditions.
Installation involves removing the stock rear upper-deck bearing and fitting this replacement. Verify fit against the listed supported models and alter other chassis parameters gradually while assessing handling changes.
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