How long do we expect the powertrain on these cars to last? I don't have a lot of mechanical expertise, but 400HP out of 4.2 liters has to put more stress on components than normal. Components like water pumps, radiators, etc. are not as trivial to replace with these cars. Am I just asking for trouble planning to put 40-50K miles on this car? I just turned 30K on the odometer of my '02 Coupe...