bought a set of bbk headers about a month ago, had nothin but leaks since, i noticed that on every port, the part of the gasket that sticks out over top the header was cracked, and even looked slightly burnt, this is the new gasket that came with the header, they are the carboard like style, has anyone else had this prob. with aftermarket headers, and do u think it would do me any good to go get gaskets that are metal? i MUST get rid of that annoying putterin sound where they r leakin all over the place!!