2.0 LITER DIESEL. Heat shield bolt. A threaded rod with a drive head (such as hex, 12 point, torx, etc.) on one end used to secure the Turbocharger Heat Shield to a mounting point. Exhaust Manifold Heat Shield Bolt. Hardware to attach the Heat Shield to the catalytic converter. HEX. HEAD. Catalytic Converter. Center. Exhaust Manifold. Turbocharger Mount.