My $210.00 3 Inch Exhaust System

The pie cut is the way to do it.
I built a chair with 1”x2” rectangle tubing. Cut a slot every 3/16” to make radius bends. Took endless hours. A series of slots can smooth the bends, just have to figure the amount of cuts. Pie cuts are quicker and take less welding.

Nice job. Will be looking for a similar kit to do mine.