The S&B Resonator Delete eliminates the factory baffle. The factory baffle quiets the turbo and hurts airflow. This inexpensive upgrade is a good addition before you decide to get the S&B Intake.
The S&B Resonator Delete will have your 6.6L L5P Duramax* generating a louder turbo whistle after a quick 5 minute install.
*Does not work with the S&B Intake