This precision kit delivers front and rear upper arms made to fit the HPI Savage 21 chassis, supplied as a single matched pair for repair or performance tuning. Main arm components are produced from Alloy-7075 and the set includes a titanium tire rod plus the required screws and a hex wrench for fitting.
Functionally the parts replace the factory upper arms and integrate with suspension geometry and steering linkages. Upgrading to Alloy-7075 arm bodies and a titanium tire rod raises local stiffness and load capacity at mounting points, which impacts handling characteristics during setup and high-load operation. Inspect existing ball joints, bearings and mounting hardware to verify correct fit before final assembly.
Installation guidance: the package provides the small hardware and hex wrench needed for on-chassis fitting. Confirm thread engagement and secure fasteners after initial running; perform routine checks after break-in and following any high-impact sessions to maintain reliability.
Use this assembly when replacing worn stock arms or when a stiffer arm solution is required for tuning and durability testing.