Exhaust Manifold Nut is an M8 flanged hex nut that secures the exhaust manifold and turbocharger mounting flanges to the cylinder head.

The copper finish resists seizing and corrosion at high exhaust-gas temperatures, allowing the nut to be released cleanly at later servicing. The integral flange spreads the clamping load across the joint face, removing the need for a separate washer.