These air cleaner kits are offered in two styles, the classic, which reflects many years of GM air cleaner styling, and the newer high-performance look. They are equipped with the CHEVROLET Trademark, and they are supplied with genuine GM (AC) air filter elements for maximum airflow. Both the topsand the bases are chrome plated to exacting standards for long-lasting appearance, and each kit is supplied with necessary mounting hardware. The classic air cleaner kits are supplied with special die-cast Bowtie center nuts (also offered separately).