I my self had terrible luck with the flowtech headers, blew a hole that was a solid 1/2 to 3/4 inch on one of the 4 tubes, as far as gaskets the only gasket i've had any luck with is the "dead soft aluminum" header gaskets. They work great and its $30 from jegs or summit racing... beats the hell outta the paper or the thin copper. Pay attention to the flange thickness (part that bolt up to the heads) Thicker the flange the less likely it will crack or warp, also the thickness of your tubes. The smaller the gauge of the tubes the thicker the metal will be which will have a slimmer chance of cracking. The size of your tubes is all on what you want for flow. To me the name of the headers don't matter it what materials they used to build them.
