I also installed Hi-Tek headers at the end of the 2010 season, I used Mercruiser gaskets as I didn't like the way the supplied Chinese gaskets looked quality wise. I have two full seasons with no issues at all, I change the zincs every spring and check them prior to my autumn haul out and they show degradation so I know they are working. Allen recommended 25 lb/ft. of torque and as it was nearly impossible to get a torque wrench on most of the bolts we just guessed, no cracks or gasket issues. I can confirm Rod's claim of the way Allen stands by his product, the first set he sent me were for outdrive not V-drive engines so he replaced them no questions asked including shipping.