One more thing to consider. IMO, using V-Band clamps are "the only way to go". They are only about $45 each (in stainless) and I was able to do the system using only two V-Band clamps and also keep it under my five foot per piece limit. I have the shorty headers flanged with copper gaskets to a single piece welded X-pipe, and then two tail pipes with the mufflers welded to the tailpipes. I have also used V-Band clamps on my sons race car and they come apart easily and go back together without leaks without any gaskets or sealer. Always easy for me to spend your money, LOL.