Cold Air Intake for 2007-2010 Chevy / GMC Duramax LMM 6.6LMaximum Performance. Our cold air intake was engineered to minimize air restriction and flow better than stock. This kit comes with a fully enclosed airbox that protects the filter from dirt and keeps out engine heat. THE SOUND OF PERFORMANCE. The huge air filter and tube produce a more aggressive sound than stock. Click the play button to listen from outside and inside the cab. NO MORE CHECK ENGINE LIGHTS. S&B devotes a huge amount of resources to