Copper Manifold Gasket Intake Exhaust Racing 240Z 260Z 280Z 280ZXNew copper intake and exhaust manifold gasket for Datsun 240Z, 260Z, 280Z and 280ZX. These gaskets are made out of . 064" thick copper to the same specs as an OEM Nissan gasket. The advantage of the copper gaskets is that they will not "blow out" under boosted conditions and they can be custom ported to match your manifold ports. These gaskets can also be reused many times over without being damaged. Use on stock or modified engines.