Nope, they come with the JBA shorty headers, and I had an extra set already so...
That just gave me another excuse to get the Solo's!
I expect you could cut the original set off, if you had to. I expect JBA would sell you a new pair as well.
I finished the install and have'em tacked in place (more pics to follow soon). Gotta work the next couple of days so I can pay for these things!
Just realised you may mean the flanges that come on the Solo's! Yes, had to cut them off to shorten them and weld on a JBA "stacker" flange (what's in the last pic). The cut off flange is in the 1st pic on the right.
If you're mounting these to your stock exhaust manifolds, you don't have to do any of this! Just bolt'em on and go!!