Eliminate exhaust leaks from the old cracked manifold in your 1998.5-2002 Dodge 5.9L Cummins with the AFE 46-40032 BladeRunner Ductile Iron Exhaust Manifold. In testing, this exhaust manifold outflowed the factory exhaust manifold by 50% improving performance and throttle response. One-Piece Construction: This manifold is constructed of durable cast ductile iron with a reinforcing rib for maximum strength between the wall flanges at the ports. Dual Auxiliary Ports: Two Exhaust Gas Temperature (EGT) probe ports are supplied for easy installation of gauges or testing equipment. Features:Â Stock Sized Turbo FlangeÂ Machined Ports, Merged Runner DesignÂ Outflows Factory Exhaust Manifold By 50%Â Thicker Walled Design Eliminates Cracking Note: Gaskets and replacement hardware not included. See items below. Not available for sale in the state of California Click here to read Emissions Notice.