Jon,
Do you have any experience with their jig? If it's not absolutely able to make semi straight tubes to the collector I can't see how they would work. Another problem is on the left side where the #1 tube has to go up and then back down as smooth as possible so the steering shaft has room to go under the #1 tube?
I surely hope so, it would save a ton of problem for so many guys that don't have headers!
DV