The RC4 runs a 370 sized motor which can get hot on a hard run and especially if you've installed larger wheels like 2.2"s. We've designed a 3D printed gearbox mount that allows us to install the larger gearbox (from the HSP Pangolin) and motor, we've personally tested this on our indoor rock crawler track and the motor is nice and cool after a run. This upgrade includes all hardware necessary for installation.

Uses the stock driveshafts and the motor has the same connectors as the stock HSP RC4 which makes it a very simple and fast installation.

This kit comes pre-assembled and as per the picture.

• Gearbox HSP #18024

• 540 motor #03011

• 14T 48dp pinion gear #AX30569

• 3D printed gearbox mount

• 4pcs - 3x12mm fine thread button head screws - these are to install the new gearbox to the chassis of the HSP RC4

• 4pcs - 3x12mm coarse thread button head screws (pre-installed in the gearbox)

• 2pcs - 3x6mm fine thread button head screws (pre-installed in the motor)