Banks Power Resonator Delete System Red Powdercoat L5P Intake Banks PowerDon't sacrifice performance, give your engine easier breathing with the Banks easy to install resonator delete. Eliminates the stock intake resonator and muffler. Mandrel bent constant diameter 4 inch steel. Gloss Red powder coat. For even more power and performance, check out our Banks Ram Air Intake 42249. Increase the airflow of your Duramax intake system Eliminates factory resonator and intake muffler 4 inch mandrel bent constant diameter steel