i got a s/s manifold for my erst. fitted it sunday n already blown the gasket from the bottom of number 1 port! i used a good quality gasket n don't think its a problem with the head face as my cast 1 never had a prob! so thinking it might be the manifold is warped! 1 of my mates jus said use 2 gaskets but i feel this is a bodge. so wats my options, get the manifold skimmed n new gasket?