The tubing has gone up , my friend.
With coating , I'll have better than a grand in a set I built.
The un-welded kit from Stahl has pre bent tubes that you will need to cut position and weld. 500.00 with 3 1/2 " collector less flanges. W-9 flanges from SPD 160.00 , 4 into 2 into 1 X 3"...