OK, I don't want to get pummeled for this post about how wrong my technique is, but here's my experience with cork gaskets. I have Needswings plenums. The first time I installed them, I torqued to spec and determined shortly thereafter that the gaskets had spooged out enough to leak. I remember that while installing them, they compressed and distorted uncomfortably trying to reach the designated torque spec, light as it is. I concluded that torque spec is probably designed for compression of the metal gaskets but too severe for the cork ones. So I removed the plenums and then reinstalled with new cork gaskets, only this time I used a slightly different approach. I very slowly and incrementally torqued everything but STOPPED torquing at any bolt location that clearly showed the gasket distorting beyond limits before reaching the torque spec. I have not had any problem since and I inspect the gasket surface regularly. I used the Needswings recommended gasket sealer. I am running a Eurocharged 185 pulley, unstacked.