The Associated Sonic 1525 is a 3500kV brushless motor designed for micro-scale RC applications. It features a finned metal can for heat dissipation, gold-plated phase wire connectors, and a dedicated sensor port for use with a compatible sensored ESC. This motor is a factory replacement option built to Associated's specifications for the RC28R platform. Features: 3500kV brushless motor Sensored motor with dedicated sensor connector Finned metal can for heat dissipation Gold-plated phase wire connectors 7/7/26 cs