Do I need new hoses and clamps when I install this?

Check your existing hoses for cracks, splits, or hardness before reinstalling—if they're brittle or visibly worn, replace them at the same time. Fresh clamps are cheap insurance and worth doing while you're in there.

Will this radiator work with my factory cooling system, or do I need to upgrade the thermostat?

This radiator is engineered to work with your factory cooling system as-is. No thermostat or other component upgrades are required.

Do I need to drain and flush the entire coolant system before installation?

Yes—drain the old coolant completely, flush the system if it's been a while, and refill with fresh coolant to spec. Don't reuse old fluid sitting in the reservoir.