Cat® Exhaust Muffler Protection Shield prevents recirculation of air from fan airflow system and shields the exhaust system from foreign combustibles. Cat® shield is held to the highest standards of quality and reliability. Tested for your rugged work environment. Cat® parts are manufactured to precise specifications and are built for durability, reliability, productivity, less environmental impact, and reuse.Application:Cat® Shield provides cover for the exhaust system and also prevents recirculation of air from air flow system. Consult your owner's manual or contact your local Cat® Dealer for more information.