Exhaust manifold nut. Left.W/TURBOCHARGER. Right.W/TURBOCHARGER. A solid metal or plastic block with a threaded hole in the center which is used to tighten or adjust the Exhaust Pipe Heat Shield. A solid metal or plastic block with a threaded hole in the center which is used to tighten or adjust the Turbocharger Heat Shield. Catalytic Converter Nut. Exhaust Manifold Nut. Part cannot be reused/reinstalled. Turbocharger Nut. Catalytic cnvrtr. Exhaust Manifold. Hexagon flange ,. Mnfd w/Converter. Support bracket. Turbocharger Mount.