O/R H-pipe Question
 

If I go with the O/R H-pipe, how much of a pain will it be to have to switch back to my stock H-pipe at inspection time and is it even worth doing?

probably not much if you know what your doing, its just unbolting and bolting back up

What about an H-pipe with hi flow cats...will that produce the same sound or atleast close to the same sound as the off road pipe

Well, it is a PITA but for the sound you want I think it is so worth it. You should just fine someone that well let you slip by without actually inspecting it.....like I definitely don't do.