Looking for a great way to get more power out of your Duramax engine? Check out the Banks 42249 Ram Air Intake. This amazing intake system can add up to 20 horsepower by itself, or81 horsepower when used in conjunction with the L5P Derringer inline tuner. It features the largest over-sized filter element available, which protects your engine and outperforms the competition. The enclosed housing keeps out hot, power-robbing engine air, extending the service life of your intake and reducing the frequency of cleaning. It also features a 5-year limited warranty. So if you're looking for an intake that beats the stock unit and the competition hands-down, go with the Banks 42249 Ram Air Intake.