I am looking at replacing my '50's Headman Headers with Ford Power Train headers and performance mufflers with 2" tailpipes on my '57 T-Bird. I'm considering Flowmasters and Magna Flow. The local exhaust shop that I am thinking about having install from the headers back recomends Magnaflo. Says Flomasters don't have as good a warranty and sound tinny. Seem to have heard that before. What do you guys like?  Don't want it to be TOO loud. Actually like the sound of the stock system but need less restrictive mufflers and bigger pipes.  Also curious as to how you bypass/unhook the headers for the strip. My old Headmans use the stock exhaust pipe and I just welded 2" water pipe cutouts in the exhaust pipes. I'm guessing I will have to fabricate cutouts or have the exhaust shop do it.