Louvered Core Fins For Increased Airflow. Louvered core fins increase airflow and accelerate heat transferto keep your engine running cool. Aluminum Core and Durable Plastic Tank.An aluminum core and durable plastic tank prevent rust and corrosion while also limiting weight and promoting longevity. For Models With Heavy Duty Cooling. Brand New in the Box - Fit and Quality Guaranteed! 25.63 x 20.38 x 0.63 in. WARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. Compatible with the following vehicles.