Maximize your engine's power with our 2011-2016 Duramax cold air intake for the GMC Sierra and Chevrolet Silverado 2500/3500 6.6L! With an improved design that flows 29.10% better than stock, you'll experience less air restriction and greater performance. Crafted of strong, high-quality silicone that handles up to 400F without cracking or tearing, this kit also features an 8-layer cotton cleanable or dry extendable media filter, a secondary inlet designed to promote better airflow, and an integrated box seal to keep out unwanted engine heat so that cooler air can be utilized for peak performance.