I bought these to replace the ones in my kids electric police car as they were slow. These have a much higher RPM and have tripled the speed of the car, giving it a new lease of life.
Beware though. They draw more amps than the standard motor, so the wireless receiver/controller will need to be upgraded as well, as does the safety fuse. I upgraded the controller and replaced the 10 amp fuse with a 20 amp one. I also installed a larger battery to give more time between charges.
The kid loves the car now, and donuts it around the back yard.