GPM Racing AF0707 Purple .21+ 2 Stage Aluminum Air Filter Made by GPM Racing; GPM Racing is a Hong Kong based company; parts are sourced from Chinese producers GPM Racing part number AF0707; UPC 083745253528 This item works with: Associated MTA4, Monster GT, Monster GT 4.6, ; Kyosho Mad Force, MP6, 7.5,777, ; Traxxas Revo 3.3 5309