Genuine OEM Audi Exhaust Manifold, part number 06E253031B. This part collects exhaust gases from multiple engine cylinders and channels them into a single pipe leading to the rest of the exhaust system. It is mounted directly to the cylinder head. Constructed from cast iron or stainless steel alloys designed to withstand extreme temperatures and corrosive exhaust gases. Genuine OEM exhaust manifolds are precisely cast to ensure proper fitment and optimal exhaust gas flow for engine performance and emissions control.