This alloy front and rear gear box set is a direct-fit RC-scale replacement intended for HPI Bullet 3.0 MT and ST nitro platforms. It is supplied as a single set and matches the service role of replacing worn or damaged gearbox modules on compatible WR8 and Bullet 3.0 chassis.
The part is aimed at serviceability: key mounting faces and interfaces mirror the original layout so you can reuse spur gear, pinion, and your existing fasteners. Follow standard teardown, confirm alignment and mesh during reassembly, and verify free rotation of the driveline before first run.
As a maintenance part, this alloy housing serves for routine repairs and inspection tasks. It typically ships as the housing set only, so check whether internal bearings or gear hardware are included when ordering.
Use this alloy housing set to replace faulty casings or to stock spares for WR8 and Bullet 3.0 nitro builds, and check the included parts list against your chassis needs on receipt.
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