aFe Bladerunner Manifolds Exhaust MAN EXH Dodge Diesel Trucks 03-07 L6-5.9L (td)Eliminate the costly exhaust manifold cracks prevalent in the factory exhaust manifold. The aFe Bladerunner exhaust manifold for the popular 5. 9L Dodge Ram Cummins sets the new standard. Constructed out of cast 304 stainless steel with a reinforcing rib for strength along the flange and ultra thick wall flange at the port. The Bladerunner exhaust manifold out flowed the factory exhaust by 23 percent improving exhaust flow, performance and throttle