Yep. You'll get the most out of it, if your ESC got a 6 volt BEC. If the ESC only got 5 volt, it'll reduce the speed and torque by 25 %.
The KO servos are great, I've had mine for a 1½ year by now.
Schumacher Mi5 - Sanwa MT-4 / RX-462 / KO Propo PDS-2123 - Nosram 5600 X-treme Saddle Pack - LRP SPX Zero/X12 17,5 - Nosram Stealth Touch Evolution - MAAS SPS 9250