Quote Originally Posted by roadster32 View Post
Yes Roger, must of made that about 40 years ago to make SBF headers.
That's a neat tool. A header guy shared with me to "...squeeze the round tube in the vice to the width desired, then "whang" the top with a hammer, squaring it off. Flip it over and "whang" it again to square off the other side. then selectively massage it to fit. I like your tapered tool better. It looks to be only nominal 1/8" (3mm) flat stock welded?