I just got my TA headers and 3" down pipe. I gotta say, these are precision made. The flanges are nice and flat. The cost was worth it for sure. My question is, when I install them, should I use any sealant on the gaskets and around the flanges/collectors? I searched the forums and one person swears by grease to seal exhaust components. Is there any merit to this? Should I just put everything on dry? Thanks.