Spectra Premium Spectra Aluminum Industrial Radiator 2001-3537 Original Equipment (OE) design to ensure exact fit, form and function for an easy drop-in installation Built with high density multi-louvered fins for maximum cooling efficiency Every radiator is subjected to an aging and endurance test in order to validate its performance under extreme weather conditions Engineered to stringent tolerances designed by Spectra Premium's in house engineering team who have in-depth knowledge of the OE part it's designed to replace Gasket and O-rings are thermal shocked to ensure durability in extreme cold weather