Without the exhaust system, there is no efficient way of processing the emission of car gases, which, as we all know, can be dangerous to the environment and man's health. The exhaust system has many parts, and each one serves a purpose, specifically in removing toxic fumes, byproducts of the combustion process. An example of such is the exhaust manifold, a network of tubes designed to transport gases to the muffler. Mostly made from steel, iron and aluminum, exhaust manifolds are located at the side of the cylinder head. Like most parts of the exhaust system, they too are easily subject to damage. If you need a replacement for a busted manifold, go for the BD Diesel Exhaust Manifold. Molded from high-silicon ductile iron, the BD Diesel Exhaust Manifold has several features aimed at full efficiency. It has joints that allow expansion and contraction without cracking or developing holes, which is common to substandard exhaust manifolds. Aside from that, the BD Diesel Exhaust Manifold is designed to deliver quicker turbo spool-up and better fuel economy while having reduced backpressure. Plus, this BD item comes with stainless steel fasteners and washers to prevent loose manifold bolts.