Using this Mishimoto radiator is easy. First, make sure your engine is completely cool before starting the installation. Remove the old radiator carefully and install the new Mishimoto radiator in its place, following the standard installation procedures for your Nissan 350z. Connect all the hoses and ensure they are properly tightened. Fill the radiator with the appropriate coolant, following the vehicle's specifications. As for maintenance, regularly check the coolant level. If it's low, add more coolant. Also, inspect the radiator and hoses for any signs of leaks or damage. If you notice any issues, address them promptly. With proper use and maintenance, this radiator will serve you well for a long time, thanks to the lifetime warranty provided by Mishimoto.