Hi, I was running between 15 and 20 psi on me t3 chipped up fiesta, the head gasket blew when the garage went to to fix it they told me the piston had melted. are standard pistons not designed for such power? ive heard about oversize pistons and mahle pistons does anyone have any ideas on this as im gunna have to cut boost to 10psi to be on the safe side when i get it back