The coolant does not leave the system other than the overflow reservoir. The pump pulley is the OEM for the engine. The thermostat is the 190 called for. I don't know the cfm rating of my fan(16"), but thinking of putting a larger one. I am using the original temp gauge, I think they put in a new sending unit? I looked at the front end again and the winch only covers 1/4 of the grill. Thank you for your input.