hi dave.
yeah, i completely understand.
sy exhausts are laid out so simply, i would just do a collection of manderels and weld em up.
ty is a bit more work.
if i was you guys, i'd hit, for example, jeff scott witha group order to build a system.
as well, there are plenty of local shops throughout the country who mandrel bend.
the bends themselves, if you wanna scratch build, are readily available.
aluminized is a good option to save a buncha $ if folks wanted.
so's sending it off to be coated - i paid, if i recall, for ex., less tehn 20 bucks to have my crossover pipe coated, at a name brand facility.
local poweder shops are cheaper, and in all areas cross the country.
any remotely competent shop can bend 3", by the way.