This kit supplies a pair of titanium universal swing shafts for the HPI Savage 21, intended as an aftermarket upgrade. The set ships with the wide 5mm drive adaptor plus pins and washers to suit the specified interface for front and rear use.
The swing shafts are intended to drop into the existing differential and hub assemblies where the Savage 21 geometry matches. Installers should verify retainer fit and pin orientation, and run a final check for smooth rotation across steering and suspension travel.
Fit this set when replacing damaged swing shafts or when converting to the wide 5mm adaptor layout; always confirm clearances before final tightening.
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