The Bladerunner 46-10021 intake manifold for your 5.9 2nd Gen Cummins 1998.5-2002 represents the next generation in intake manifold design. The Bladerunner intake manifold uses a unique MDV (Multiple Directional Vane) technology to guide the air through the manifold maximizing air flow. Constructed out of cast A356-T6 aluminum and uses a proprietary internal bolt design to help increase the flow and provide a solid seal void of leaks or deformities. the Bladerunner comes with up to 5 ports for nitrous injections, gauges and other accessories used by hardcore enthusiasts. In recent testing the Bladerunner intake manifold produced 5hp and 15lbs. x ft torque.