The Yokomo D-139 is an upper A-arm style aluminum shock tower produced for use with the DriPack drift package on 1/10-scale RC drift cars. It replaces the standard front mounting to adopt an A-arm upper configuration that corresponds with the SSG front shock tower arrangement referenced in the source note.
Function and setup: the tower supplies alternate upper A-arm mounting points to let you tune camber and roll traits via hole selection. As a conversion component it changes suspension geometry to help refine front-end characteristics when practising or competing in drifting.
Compatibility and constraints: intended for DriPack drift setups only; it cannot be used with the D-102 Imadoki Conversion. Validate your chassis hole pattern and mount positions before attempting to install the D-139.
Installation notes: align the tower to the chassis holes, inspect steering and shock travel for interference, then secure using the recommended fasteners and torque pattern to avoid deforming the aluminium plate.
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