So my Head is currently at Lerenzos Fast Flow Cylinder heads....well known shop in my area i know alot of cars they have worked on...all domestics however..They told me to use a felpro gasket over the Greddy or HKS or any other companys..His reason was becuase its a multi layer gasket..now i dont know enough about the Greddy or HKS to know if there the same but has anyone used a felpro gasket here or have anything to say about them..?he says he has seen many do fine on 700hp 7mgte motors