S&B Filter 75-5102 Cold Air Intake For 04-05 Chevrolet Silverado GMC Sierra V8-6.6L LLY Duramax Cotton Cleanable RedMaximum Performance Our cold air intake for the 2004 2005 Chevy GMC Duramax LLY 6. 6L was engineered to minimize air restriction and flows 44. 63 percent 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