3S Brushless Conversion BOOST Box

Unlock serious performance from your ARRMA basher with the ARRMA 3S Brushless Conversion BOOST Box (ARA210005). This complete power module upgrades 4X2 BOOST and MEGA brushed vehicles to 3S brushless, pairing a Spektrum Smart 3S ESC with a Spektrum 3660 3200Kv motor, dedicated heatsink and a 30mm cooling fan for reliable running. To tailor gearing across different tyre diameters, 15T, 18T and 20T Mod 0.8 SafeD pinions are included, along with an assembled power module and dual slipper featuring a 57T Mod 0.8 sintered spur gear. A QR code links to a step-by-step assembly video, and ARRMA BOOST decals finish the upgrade with style.

Key Features

• BOOST your vehicle's speed potential whenever you're ready


• Includes top-quality Spektrum Smart 3S brushless ESC and brushless motor


• Step-by-step online video demonstrates easy installation


• Bonus colour ARRMA BOOST decals also included


• Go from RC bashing to RC blasting!

What’s Included

• (1) 3S Spektrum Smart Brushless Firma 100A ESC


• (1) 3S Spektrum 3660 3200Kv Brushless Motor & ARRMA Heatsink


• (1) Assembled Power Module & Dual Slipper With 57T Mod 0.8 Sintered Spur Gear


• (1) 30mm Electric Fan & Cover


• (1) 20T Mod 0.8 SafeD Pinion


• (1) 18T Mod 0.8 SafeD Pinion


• (1) 15T Mod 0.8 SafeD Pinion


• (1) All Necessary Hardware


• (1) ARRMA BOOST 3S Brushless Upgrade Product Manual


• (1) ARRMA BOOST Decal Sheet

Suggested Compatibility

Suggested compatibility includes the following ARRMA 4X2 MEGA BOOST basher vehicles as the recommended next upgrade after the ARA21003 4X4 Transmission Upgrade Set:

With Spektrum Smart Battery & S120 USB-C Smart Charger:

• ARA4102SV4T1 GRANITE™ 4X2 BOOST Monster Truck RTR Orange/Black


• ARA4102SV4T2 GRANITE™ 4X2 BOOST Monster Truck RTR Blue/Black


• ARA4103SV4T1 SENTON™ 4X2 BOOST Short Course Truck RTR Green/Black


• ARA4103SV4T2 SENTON™ 4X2 BOOST Short Course Truck RTR Blue/Black


• ARA4105SV4T1 VORTEKS™ 4X2 BOOST Stadium Truck RTR Red


• ARA4105SV4T2 VORTEKS™ 4X2 BOOST Stadium Truck RTR Gunmetal

Without Battery & Charger:

• ARA4102V4T1 GRANITE™ 4X2 BOOST Monster Truck RTR Orange/Black


• ARA4102V4T2 GRANITE™ 4X2 BOOST Monster Truck RTR Blue/Black


• ARA4103V4T1 SENTON™ 4X2 BOOST Short Course Truck RTR Green/Black


• ARA4103V4T2 SENTON™ 4X2 BOOST Short Course Truck RTR Blue/Black


• ARA4105V4T1 VORTEKS™ 4X2 BOOST Stadium Truck RTR Red


• ARA4105V4T2 VORTEKS™ 4X2 BOOST Stadium Truck RTR Gunmetal

Suggested compatibility also includes ARRMA 4X4 MEGA vehicles.

Compatibility & Notes

• BOOST models will require an SLT3 receiver for compatibility (such as Spektrum SLR300).


• Not compatible with stock NiMH Battery (SPMX33007C3H) and IC3 Connector.


• Pinion options (15T/18T/20T) help match gearing to differing tyre diameters.