aFe BladeRunner is a great addition to the 5.9 Cummins
True to their advertisement, this manifold made the truck more responsive. Also, the factory manifold was warped and the gaskets were leaking, so installing this manifold with thicker flanges and connections between the runners will provide a lifetime of leak-free use.
Best stainless manifold for the price
I'm not a big AFE fan, and looked hard to find a solid stainless manifold elsewhere. But all my research kept leading me back to AFE. They have a quality design that will last for the life of the truck. So if you are looking to improve your exhaust flow, lower EGTs, have a place to put your EGT temp sensor, then this is probably the best manifold for the 5.9L.