OEM replacement radiator my Z came with back in 2003, that piece of crap couldn't even cope a Cali summer with the AC running on the freeway. I swapped out to a "Nissan Eurospec" radiator and instantly ran cooler, and never overheated since even sitting in nice LA traffic blasting the AC.
Member # 54233 and The 4th Z32 Project.....Its time to do it all over again...