I have hooker comp headers on the longhorn, & really like them. The flanges & tubes are heavier than the hedmans that I took off(16 guage tubing), & the collector rings are welded to the collector making them a little stiffer. I am running the gaskets that came with the headers at this time & havent had any problems. On the header to head gaskets, i have had good luck with MRG ultra,but some guys like the copper gaskets. I tried copper collector gaskets, but didnt like them. I think an aluminum collector gasket would be a better deal. As far as keeping them tight, I retork several times the first couple weeks of driving(after the eng cools), & its a good idea to have hangers on the pipes somewhere close to the collectors(it helps keep the weight of the system off the headers). Good luck......crazy AL
