This GPM part is an RC-scale connector paired with a 1.4mm damper spring intended for HPI Savage 21 maintenance and tuning. The assembly is described by its function rather than complex specifications: it links shock components while providing a spring element sized at 1.4mm wire diameter and a 113mm free length as named, making it suitable for direct replacement or setup adjustments on Savage 21 shock units.
Installation is straightforward for hobbyists familiar with Savage 21 maintenance, the connector replaces the shock linkage interface and the spring swaps into compatible shock bodies. Check fitment on your existing shock rod and spring retainer before final installation, and verify travel and preload after assembly to ensure intended suspension behaviour on your Savage 21 scale model.
In tuning terms this part is used to alter damping response by changing spring stiffness and length in the suspension stack, it is most relevant when adjusting ride height, rebound characteristics, or replacing worn spring hardware on Savage 21 race or hobby setups.
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