Kyosho MP9 Aluminum Throttle Servo Horn. This is an optional servo horn intended for the Kyosho MP9 platform. Constructed from high grade aluminum this arm features excellent strength and durability along with fitting securely with a clamping spline. The horn is also stepped on the brake side, eliminating the collars that are used to raise the linkage rods. Package includes one 25T servo horn and mounting hardware.