Was wondering what your take is on using a gasket on the turbo to header flange.SCE sells a copper gasket and RJC sells one also that looks to be made out of some type high temp material that has good compression properties. Of the two which should I use? Was noticing that the some use high temp RTV on the flange and have good exhaust seal and don't even use a gasket.Another question what about downpipe to turbo area some use a gasket others don't. Do you get a better seal metal to metal if surface is straight and clean .Just wondering what the consensus was in regards to using gaskets or not using them as I'm fixing to change out turbo and want to do it right and do it only once . TIA