The J5D "Brick" brass under battery weight was designed specifically for the J5D XSC2 to optimize weight balance and lower the CG even further. Our testing showed that the truck benefits from the more forward weight placement of square style lipo packs, but as that trend is slowing, square lipos aren't as easily available as they once were. Our "Brick" under battery weight allows the use of a standard shorty pack, but also gives the added benefits of some weight being moved forward as well, all while keeping the extra weight as low as possible to improve the CG.
The set comes with one brass plate weighing 54g. The J5D brass under battery weight set also fits in the XB2, XT2, and any other vehicle that accepts square lipo packs.