Yea I know to replace both HG's. I was just wondering what is good these ones are only 40 bucks with all other gaskets in the head. Seems good just for the other gasket to buy it. They are graphite with metal rings. Im planing on running 12 psi or so just to get a little more power then stock. 3'' exhaust and FMIC or TMIC I dont know yet. Only has 97k. So should be good. Like 200 crank or so. I think these gaskets will work.