I can't understand the Silicone haters--used in the right way in the right place it is a wonder product--I can't dream of returning to corks under intake ends can you??My dad retores Model A Fords last 50 years--he HATES silicone and never uses it --on that application he is right --do it old school--he is a Fink for perfect clean no burr gasket surfaces--won't even allow paint on gasket surface--butthe threads that hate on the goo puzzle me---I love the stuff!!!!