[alphalanos]

Im planning on replacing my stock exhaust (cat back, which on my car is actually header back) with a custom one. do most muffler shops use crush bends or mandrel? Dont they usually have a bunch of short peices from which they trial fit and weld together until its done? im assuming they will recommend an inline muffler (before the rear muffler) to quiet the exhaust down a little bit. is it expensive for them to weld a flange onto the new piping and taper it to a larger size? (from the header size to the 2.5 or so pipe i want to put in.)