3D0317810K Genuine OEM Volkswagen Exhaust Manifold, part number 03H253017D. This component collects exhaust gases from the engine's cylinders and directs them into the exhaust system. It is a critical part of the engine's exhaust management. Genuine OEM exhaust manifolds are cast or fabricated to exact specifications for proper fitment, sealing, and optimal exhaust gas flow, contributing to engine performance and emissions control.