Hi Is anyone running the new Inlet Manifold Gaskets - Aluminium Replacement for the plastic OEM ones. I am in the process of refurnishing my engine and I suggested to my mechanic that he considered the new Mace Aluminium ones. See link below for details. Inlet Manifold Gaskets - Mace Engineering Group My mechanic is prepared to give these a go however he some reservations regarding Aluminium being able to "crack" and get a good seal like the OEM plastic ones. He did acknowledge the some OEM ones can fail after 150000kms. Anyone had these for a sufficient length of time and distance on their vehicle to confirm performance and durability.