START 2WD, END UP 4X4 / THE ARRMA BOOST PATHStart 2WD, End Up 4X4: The Arrma Boost Path

Buy a brushed Arrma MEGA truck now. Upgrade it later, one kit at a time, on the same chassis. You never throw the truck away to move up.

What is a “Boost Box”? Exactly what it sounds like — Arrma puts a complete upgrade in one box. Every part, every screw, nothing to hunt for. One box, one upgrade: 4X4 conversion, brushless power, metal gears, and so on. On this page we call them upgrade kits.

Buy an upgrade kit with the truck and the discount comes off automatically. No code needed.

Fastest Route: Granite Mega 4X4 — $162.99 (was $219.99)

Already 4X4, so no conversion kit needed. Discontinued — green, blue and orange while they last.

Add any of these kits and take 20% off the kit:

  • Power Module & Metal Slipper (ARA210013) — $91.99. Do this first.
  • Metal Slipper & Input Gears (ARA210006) — $89.99. Pick this OR ARA210013, not both — they overlap.
  • Front & Rear Metal Diffs (ARA210007) — $114.99.
  • Wide Track Arms (ARA230008) — $34.99. Lands jumps better.

Budget Route: Start 2WD, Convert Later

A Fury or Vorteks plus the 4X4 Conversion Kit (ARA210003, $47.99) is a four wheel drive truck for less than a brushless 2WD Fury.

Buy any upgrade kit with a Fury or Vorteks and take 10% off the kit.

Upgrade in This Order

  1. 4X4 Conversion Kit (ARA210003) — skip if your truck is already 4X4.
  2. Metal Slipper & Input Gears (ARA210006) — before any brushless motor, or the plastic gears strip.
  3. 3S Brushless Kit (ARA210005, $199.99) — brushless motor and ESC. The big speed jump.
  4. Front & Rear Metal Diffs (ARA210007) — to survive the extra power.
  5. Wide Track Arms (ARA230008) — last, only if you want more stability.

Not sure which kit fits your truck? Visit the shop or if you are out of state give us a call. Arrma changed the MEGA line more than once and the kits are not all interchangeable.

Already Own an Arrma 4X4 MEGA?

Then this page is really for you. The kits fit, and you do not need to buy another truck to use them.

If the truck is already running and you are wondering where to spend first: metal slipper and input gears (ARA210006). That is the part that gives out, and it gives out sooner the harder you drive. Metal diffs (ARA210007) next if you are on 3S. Wide track arms (ARA230008) are the cheapest change to how the truck lands, and the one people notice most.

Still brushed? The 3S Brushless Kit (ARA210005, $199.99) is the whole conversion in one box — motor, ESC and power module. Fit the metal gears first, not after.

Starting from a different 4X4 MEGA? These take the same kits:

Spares for the 2WD Trucks

Why Buy From RC Car World?

  • We stock the spares — including older generations, for every brand we sell.
  • We repair what we sell — diffs, ESCs, bearings, electronics. Bring it in or ship it in.
  • We have built these — ask, and you get a straight answer, even if it is “buy the other one.”