WCFAB 2017-2019 L5P Duramax 4" Intake Kit with Air Box Stage 2Powdercoat colors can be found here! This high flow fabricated aluminum intake pipe, intake horn, and air box enclosure with dry filter assembly replaces the restrictive plastic factory parts on your Duramax Diesel for improved engine performance and sound. All new design significantly increases airflow to your turbo producing improved horsepower and torque, quicker throttle response, and cooler intake temperatures by drawing cold air through the hood