With 2020 and up Duramax engines, GM has further tightened the allowable range for induction tuning. Banks Ram-Air Cold-Air Intake System (Part Number 42266) is engineered to dramatically improve airflow, filtration efficiency, and overall engine breathing for 2020–2023 Chevrolet and GMC 2500/3500 trucks equipped with the 6.6L Duramax L5P diesel.
