This JR-THNE05-GU aluminium gear box cover is an aftermarket replacement part made to fit the Tamiya DT02, DT03, DT04 and Hornet EVO chassis specified in the title. Finished in gun metal, the cover is a direct-fit external shell that locates to the original gearbox mounting points and uses the existing screw positions on those Tamiya platforms.
Functionally, an aluminium cover adds rigidity around the gearbox area and offers a more durable surface than many stock plastic covers, helping the chassis resist deformation under load while preserving gearbox internals and service access.
Installation is straightforward: remove the stock cover, verify gear mesh and seals, fit the JR-THNE05-GU into the original screw locations, and secure fasteners without over-torquing. After fitting, confirm proper alignment and free rotation of the spur and pinion to avoid binding.