Cold Air Intake for 2017-2019 Silverado / Sierra Duramax L5P 6.6LMaximum Performance Our cold air intake for the 2017 2019 Silverado Sierra Duramax 6. 6L was engineered to minimize air restriction and flows 47. 70% better than stock. This kit comes with a fully enclosed airbox that protects the filter from dirt and keeps out engine heat. Protect Your Engine This kit comes with a massive, highly efficient air filter which results in better performance and protects your engine. Available in either 8 layer Cotton