Hot Racing SAES80 Steel Gear Differential Outdrives Sc18 18t2 18b2 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 SAES80; UPC 083745633467 This item works with: Associated RC-18T2, SC-18