The Yokomo D-139 is an aluminum upper A-arm shock tower created for use with the DriPack drift package on 1/10-scale RC drift cars. It substitutes the factory front mount to provide a reinforced A-arm upper mounting arrangement matching the SSG front tower configuration referenced in the source.
Design and tuning: this tower adds firm mounting options for the A-arm upper that let you tune camber and roll center by choosing alternate holes. As a chassis conversion it is used to change suspension geometry and to make the front end more predictable during aggressive drifting.
Compatibility and constraints: described for DriPack drift setups only; it is incompatible with the D-102 Imadoki Conversion. Confirm your chassis hole spacing and mounting features before attempting to fit the D-139.
Installation notes: set the part into place so fastener holes align, then verify steering clearance and full shock travel prior to final torque. Use the correct hardware and follow a careful tightening sequence to avoid bending the aluminum plate.
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