Building your own headers.

I made my own headers out of s/s. Bought the ready made bends & cut to shape. One of the reasons I made my own is because I found brand name headers hung too low. Another reason, I didn't want them to rust out....
No need to get the primary pipes equal length, does nothing of value. See David Vizard's exh systems video. Sec [ collector ] diam & lengthy is important. I had a spare block & trans which I used as a template to make the headers. Been on the car 20+ yrs.