Automatic transmission, polished finish. An OEM radiator just isn't designed to cool a high-horsepower engine, and overheating can take the fun out of using your specialty vehicle quickly. Now, Be Cool has your answer. A high-quality Be Cool all-aluminum radiator will lower your coolant temperature a minimum of 20 degrees, or your money back. GUARANTEED! For parts 16859 through 16862: -With late model LT-1 engine -With small outlets and crossflow conversion -Core dimensions 27w x 17h -Radiator dimensions 32w x 17h