The GPM CGK5090X is an aluminium 90mm front and rear internal shock set made for Vaterra K-5 and listed for compatibility with HPI Crawler King and Gmade R1. These sealed internals have engraved bodies to maintain a tidy profile and are lower in height than external coil-over units.
For the modeller, aluminium internals change the suspension response by altering mass and heat transfer characteristics and by giving a solid surface for tuning oil and spring choices. The kit is supplied as one pair intended for use in either the front or rear positions, as your chassis requires.
Fitment advice: confirm the 90mm dimension, stroke and eyelet spacing against your chassis before installation. Typical setup is to swap the internals into existing housings, verify clearance, then fine tune oil and spring rates to suit vehicle weight and terrain.
If you want a neater chassis appearance and a consistent internal shock platform for tuning, the CGK5090X 90mm aluminium internals are a straightforward upgrade for 1/10 crawlers.
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