I am not sure what the stock fan flows, but here are the details on the Mishimoto fan...
CFM: 954.1
Fan Diameter: 328mm
Fan RPM: 2290
Number of Blades: 10
Current: ~5.5A
Volts: 12.3V
Amps: 5.6
Velocity Ft/Min: 740
Inlet Pressure While Tested: -0.038
Air Temp While Tested: 62.1 (degrees F)