Hot Racing ECX 1/10 4WD Circuit Stadium Ruckus Aluminum Steering Knuckle ECF2106 Made by Hot Racing; Hot Racing is a United States based company; parts are sourced from Chinese producers All Hot Racing upgrade parts are direct replacements for stock components; additional parts are not required Hot Racing part number ECF2106; UPC 083745963991 This item works with: ECX 1:10 4WD Circuit Stadium, 1:10 4WD Ruckus Monster, 1:10 4WD Torment Short Course