HPI Savage 21 170mm Alloy Spring Caps - Direct Fit SAV13170/SC by GPM  [SAV13170/SC]

Sturdy alloy spring caps for Savage 21 shocks

This replacement set supplies alloy spring caps built for HPI Savage 21 170mm dampers. The kit contains 4 pieces that sit on the shock top where the coil spring seats, creating a tougher mounting surface for common tuning and ride-height adjustments.

Material and role: the alloy construction gives a firmer spring seat compared with stock plastic, helping keep spring preload consistent and reducing seat deformation under heavy off-road loads.

Installation notes: these caps fit at the shock top in place of the original spring seats. You will need to partially disassemble the shock; typical tools are a hex driver and a soft-jaw vice or padded pliers to avoid marking the alloy. No extra hardware is included.

Tuning context: riders use alloy spring caps to stabilise spring alignment, make small preload changes repeatable, and prevent the spring from shifting under lateral forces during jumps or rough terrain. This is a simple hop-up that improves seat stability without altering spring rates or damper internals.