The GPM CGK5090X is a 90mm aluminium internal shock set produced for Vaterra K-5 and noted as compatible with HPI Crawler King and Gmade R1. Engraved aluminium bodies give a consistent look while the sealed internal design reduces external bulk compared with coil-over arrangements.
As a tuning upgrade, replacing stock internals with aluminium inserts alters mass distribution and improves thermal conduction, providing a solid base for tuning oil and spring combinations. The item is provided as a one-pair set suitable for front or rear positions based on your chassis layout.
Fit guidance: confirm 90mm sizing, stroke and eyelet distances against your chassis before fitting. Install by replacing existing internals, confirm body clearance, then tune oil viscosity and spring stiffness to suit vehicle weight and terrain conditions.
For owners seeking a tidy appearance and a stable internal platform for suspension tuning, the CGK5090X 90mm aluminium internals are a solid aftermarket option for 1/10 crawlers.
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