SLK: That was my first (and cheapest) choice but the V&H 2-into-2 missed accomplishing this by about 3/8", so I had to go to Plan B. The nice thing about the extensions is they are so adjustable, i was able to set them up exactly the wife wanted them. Flipping the mounts won't work with stock pipes, V&H or Cobra Swepts. Great option for those running Dragsters, Morton's, LA Choppers or ones like that. With that said, must say I'm very happy with the Kuryakan extensions and floorboards.
SweetTooth: Yeah, pretty close. Mine are 4" extensions (can't mount them vertical on the right because of the exhaust) and mine don't have the gentle curve these do (that should make them even better) but functionally speaking, that's what I'm running. I'll warn you though, your significant other will be so happy with the change, you can expect some big rewards and they probably won't be the only things mounted.