This is the Xerun V10 G2 4.5 Turn Modified Brushless Motor, recommended for 1/10 on-road, and off-road vehicles.
Xerun V10 G2 Motors
Specifically designed for extreme running in top 1/10 and 1/12 scale competition racing, the V10 G2 series motors and are compliant with ROAR, IFMAR, BRCA and JMRC..