This purple aluminium gearbox housing is an aftermarket replacement built for the HPI Savage Nitro Off Road Series. The alloy construction gives a more rigid mounting point for spur and pinion alignment and helps resist deformation during demanding off-road runs.
Designed role: improve chassis durability and simplify tuning. The aluminium shell maintains consistent gear engagement under load and makes spur gear height and bearing swaps more predictable. Supplied as the housing only; internal gears and bearings are not included.
Fitting notes: basic removal of the original plastic casing is required and internals must be transferred. Retain compatible fasteners when possible and recheck mesh and backlash once installed. Confirm screw lengths and any spacer use before completing assembly to prevent motor pinion or spur interference.
This alloy housing is intended for model owners seeking a firmer gearbox shell for consistent setup on HPI Savage kits, providing improved alignment without modifying the internal gear ratios.
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