Improved motor helps you achieve higher speeds and quicker acceleration;Heat sink helps prevent motor from overheating, giving you longer running times and more power;Compatible with Evolution cars and trucks (required) (not compatible with older XMODS);What's in the box: *Motor, *Pinion gears (6), *2nd gears (2), *Spacers (6), *2nd shaft, *Heat shink, *Removal tool;You'll also need: Compatible with XMODS Evolution cars or trucks

• XMODS Evolution Stage 2 Motor Upgrade Kit

XMODS Evolution Stage 2 Motor Upgrade KitRadio Shack