The Banks 42266-D Ram-Air is a high-performance cold air intake designed for the 2020-2023 Chevy and GMC 2500HD/3500HD trucks equipped with the 6.6L Duramax L5P engine. Constructed with a Big-Ass filter, oversized induction tube, and a bellowed silicone coupler, it enhances power, turbo response, and fuel efficiency while maintaining durability and dirt capacity.