The GPM aluminium rear gear box fits ARRMA KRATON 8S rigs to reinforce the rear differential mounting and nearby components. By limiting unwanted flex at the dampers, anti-roll bar and knuckle arms, the unit helps produce steadier steering under load.
Using 6061 T6 aluminium reduces flex and improves heat dispersion compared with stock materials, keeping tolerances tighter during extended runs. The upgrade is aimed at hobbyists who want a durable, dependable rear end for heavy use.
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