If you own a 5.9 Cummins, you know that there's always room for improvement when it comes to performance. That's where the Banks 42766 3.5 Inch Monster Ram Intake Manifold comes in. This intake manifold delivers instant torque and quicker throttle response, thanks to its larger and less restrictive design. It also raises boost without increasing turbine drive pressure, giving you the power you need to out-boost the competition. Additionally, it includes six 1/8-inch NPT ports for custom installation of various accessories, and comes with a 3.5-inch mandrel-bent boost tube for optimal airflow. Plus, it's CNC port-matched for stock heater and Banks Billet Heater Delete, making it a perfect upgrade for your 5.9 Cummins.