Add the extra durability of the ARRMA 4S transmission to your ARRMA 4X2 BOOST, MEGA, or 3S vehicle using the ARRMA Metal Slipper and Metal Input Gears BOOST Box upgrade package. Then you're ready to power up and go from bashing to all-out blasting!

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sku: ARA210007

Install the extra-durable ARRMA Metal Diff BOOST Box option part package and bring out the beast in your 4X2 BOOST, MEGA, or 3S basher. Included are strong, all-metal front and rear diffs with full metal ring gears, input gear, and internal gears.

MSRP:

Now: $119.99

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sku: ARA210013

Metal Slipper Power Module BOOST Box

MSRP:

Now: $95.99

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sku: ARA310908

Arrma 4S BLX Slipper Pads (4)

MSRP:

Now: $10.99

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sku: HRAATF505F02

Monster Blower Motor Cooling Fan Kit: ARRMA 3S, 4S BLX Vehicles

MSRP:

Now: $38.88

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sku: ARA310948

Arrma 4S BLX 0.8Mod Steel Slipper Set (57T)

MSRP:

Now: $95.99

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