Hey my head gasket blew. I am trying to replace it with a metal one. Which one should I go with Cometic(cheaper) or Greddy(expensive), also the sizes im looking at 1.2mm or 1.4mm? in addtion and the bore size on stand is 86 is standard. Most greddy gaskets bore sizes are 87mm or 88mm. Please I need help with which one to go with? Also, getting an after market intake manifold good to go with?