The Yokomo D-156UM is a front upper mount engineered for the DPR series upper A-arm and provides six selectable pivot positions to alter upper link geometry. It is aimed at RC drift package applications and fits DP-DPRA and DP-DPRH chassis.
Small changes to pivot placement produce incremental differences in roll center and link leverage, affecting steering onset and transient roll. For durable, repeatable results, try one pivot change at a time and evaluate chassis behavior across multiple runs.
Fitting the unit replaces the existing upper mount on the DPR upper A-arm and uses the vehicle's original mounting points. Standard tools for suspension work will suffice; after installation, confirm unrestricted arm travel and adequate steering clearance before driving hard.
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