Have you installed your own kit exhaust?

I know you addressed sharpie, but the kit I got from Jegs was a direct bolt up to the Hooker Headers and came complete with instructions and pipe hanges.
You may want a chop saw on hand (Circular saw) to adjust pipe length and Leisle sells a hand turned (Ratchet or wrench really) pipe expander. Some pipe fits varied by 1/64 from dead on. While that's near nothing for some......
It's a ***** to get on when it's "That hair small" of a fit.

The Jegs did not have or come with a H or X pipe. True duals they are.