Allstar Performance aluminum direct fit radiators provide increased cooling over original copper radiator. Designed for performance vehicles, features include machined billet aluminum filler necks, fully welded construction and two rows of large 1" tubes properly spaced for maximum airflow and cooling on the street even at lower speeds. Built-in automatic transmission coolers have 1/4" NPT fittings. O.E. fan shrouds may require modification for installation.