This is the replacement Kyosho Aluminum Knuckle Arm Set for the TKI4 buggy. These updated steering knuckles feature shorter steering arms to change the Ackerman angle, and promote increased corner speeds. By maintaining more correct Ackerman angle throughout the range of steering motion (especially at higher degrees of steering angle), there’s less slip angle, which means the TKI4 carries more corner speed than any Inferno before it.