Looking for an exhaust manifold upgrade for your 5.9 Cummins? Check out the AFE 46-40011 SS Exhaust Manifold. This cast 304 stainless steel manifold is a drop-in replacement for your stock manifold and comes pre-drilled and tapped for two EGT probes. It also features a thick-walled design for maximum durability and outperforms the factory exhaust by 23%. So if you're looking for better performance and durability, the AFE 46-40011 is the exhaust manifold for you.