The two intake manifolds are extremely similar when it comes to performance, but the Banks Power High-Ram 3 1/2" Intake Manifold 42764 extends that performance one step further by upgrading the boost tube to a larger 3.5” diameter. Larger tubing with the absence of flat spots and sharp curves equals better airflow. Any restriction that reduces pressure also reduces air density. Therefore, smooth large-diameter boost tubes effectively add air density by having less of a pressure drop than the factory boost tubes.
The 2 items will fit all 98-02 5.9L Cummins.
The two intake manifolds are extremely similar when it comes to performance, but the Banks Power High-Ram 3 1/2" Intake Manifold 42764 extends that performance one step further by upgrading the boost tube to a larger 3.5” diameter. Larger tubing with the absence of flat spots and sharp curves equals better airflow. Any restriction that reduces pressure also reduces air density. Therefore, smooth large-diameter boost tubes effectively add air density by having less of a pressure drop than the factory boost tubes. The 3" manifold utilizes your stock 3" boost tube, which is more obstructive on airflow.
The Banks Power High-Ram 3 1/2" Intake Manifold 42764 would not require the removal of the Grid Heater. The item will install with the Grid Heater left in place.
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