Originally Posted by z&cobb
It's another one of the original parts that have not failed. Lucky, I guess.
Mine had ~150K on it when the radiator kacked. It failed at the top along the seams where the plastic top header is crimped to the radiator core.
One other point, my WRX has an automatic. New hoses for the ATF cooler are not included when you swap to the new style radiator. However, the original hoses were in very good condition. They are well-protected by a metal shield and I reused them needing only new hose-clamps.