I've been running a Spectra plastic/aluminum for 3 years with zero issues. Another member here advised me to switch my rad cap for one a few lbs lower, maybe even as low as 7lbs I can't recall exactly, than the factory spec as he had done so for several years without issue. Mine has been bounced around a lot and even when I've tried to get things hot I can't get my temp gauge to go over 210-215. Admittedly I wish I had had the time to look around and get mine re-cored but I needed an off-the-shelf solution and NAPA had the Spectra's in stock.