Losi LOSB3603 Brake Cam LST LST2 Aftershock MGB LST XXL

The Losi LOSB3603 is a brake cam built for the LST, LST2, Aftershock, MGB, and XXL. The brake cam converts your servo's rotational movement into the clamping force that presses the brake pads against the discs, making it a central working part of your braking system every time you pull the trigger.

A worn or rounded cam can leave your brakes feeling soft, inconsistent, or slow to engage, which matters on a large, heavy platform like the LST or XXL where strong, predictable braking is especially important for control. Because the cam engages with every braking input, it wears gradually over the life of the truck and is worth inspecting whenever your stopping power starts to feel diminished. This genuine Losi replacement part matches the factory specification for these large-scale platforms, so it installs into your existing brake assembly without modification. Keep one in your pit box to maintain confident, consistent braking.