Looking for a top-of-the-line intake for your 2001-2004 LB7 Duramax? Check out the AFE 51-74001 Pro Dry S Momentum HD Intake. This system features a one-piece sealed housing, massive Pro Dry S air filter, and premium hardware. It's been shown to outflow the factory intake by 32% and produced 24 additional horsepower and 44 lbs. x ft. torque. So if you're looking for serious performance gains, the AFE 51-74001 is the way to go.