This is a Metro racing jr dragster motor. Don't know much about it. My daughter raced it 6 times and wanted a faster motor. This is an 8.90 motor. Comes with header pipe, carberator, and polar jr clutch. I don't know the total number of runs but it ran great when my daughter ran it. The only reason the motor is out of the car is because we got her a 7.90 motor so she could run in a faster class.