S&B Cold Air Intake For 2001-2004 Chevy & GMC Duramax LB7 6.6L DieselEnhance the performance of your 2001 2004 Chevy or GMC Duramax LB7 6. 6L Diesel with the S&B Cold Air Intake, expertly engineered for maximum airflow and efficiency. This intake system minimizes air restriction, providing an impressive 44. 63% better airflow than stock, ensuring your engine operates at its best. Key Features Fully Enclosed Airbox: Designed to protect the air filter from dirt and keep out engine heat, our airbox promotes optimal