aFe Bladerunner Ductile Iron Manifolds Exhaust Dodge Diesel Trucks 03-07 L6-5.9L (td)aFe Power is pleased to announce the release of the new ductile iron BladeRunner exhaust manifold for the 03 07 Dodge RAM Diesel Trucks L6 5. 9L (td). In recent testing, this exhaust manifold outflowed the factory exhaust manifold by 23%, improving performance and throttle response. The thick wall (0. 25" vs. 0. 15") flange design increases strength, eliminating warping and cracking prevalent in the factory exhaust manifolds. The matched ports and