aFe BladeRunner Ported Ductile Iron Exhaust Manifold | GM Diesel Trucks V8-6.6L (01-16) (46-40024)BladeRunner Ductile Iron Exhaust Manifold (46 40024) by aFe. Replace the exhaust manifold on your Dodge diesel with the BladeRunner manifold. It was created to address a cracking problem with the stock manifold, but it's so far advanced compared to the stock unit, you should replace your OEM manifold even if there's nothing wrong with it. The BladeRunner manifold will not only last far longer, it will improve performance and lower exhaust gas