i noticed a leak coming from the back of my cylinder head around the header and plug well. thought maybe that i had a header gasket leak so i changed my gaskets but no luck.. come to find out that my plug well is cross-threaded and its leaking air out around the plug. i have victor jr p&p heads the stage III heads from fox lake, but now i have take it out send it back and pay for it to be healy coiled. what a pain!!! (if they can, that is).