2013-2016 LML HSP COLD AIR INTAKE 502-2-HSPUpgrade your 20132016 Duramax LML with the HSP 502 2 HSP Cold Air Intake System, engineered to increase airflow, improve throttle response, and deliver noticeable horsepower and torque gains. Featuring a large 4. 5 inch high flow intake tube and a sealed heat shield box, this intake system reduces restriction and helps your turbocharger pull cooler, denser air for improved combustion and engine efficiency. The HSP intake draws air from the factory