Cometic Intake Manifold Gasket CA18DETCometic Intake Manifold Gasket for Nissan CA18DETAn Aluminium Foamnet gasket for between the head and inlet manifold. Compatible with CA18DET (all manifolds). Cometic gaskets are designed for extreme cylinder pressures. They maintain a torque set and resist corrosion. They will not burn through or push out and withstand different combinations of cylinder head and exhaust manifold materials. No sealants are required.