%$#&* Hooker Headers!

In most cases, the flanges are warped due to us overtightening, so they dont leak..I always use the Mr Gakset Ultraseals, and I use flat file to remove any high spots..Do not use any silicone on the mating surfaces, only on the threads of the bolts, and tighten for the center two out. I also will replce the supplied bolts with either allen headed, or std cap screw styles that are about 1/4 inch longer, so they dont weep coolant. if you really tighten them so they dont leak, you bend the outer flanges every time. the stage 8 locking bolts are the ticket with aluminum heads..