There was a slight up charge, not much more, but I didn't pay the full price listed on their web site. Call Marcus at River City Offroad, he handled all the details.
I'm not sure what you would do if you changed to new wheels with more offset, you'd need to pm Dave at GenRight about that...
Sounds good thanks for your help man.
2010 Mango 2dr 6spd Rubicon
PSC BFH front and rear, Warn 9.5cti with viking synth line, Rigid duallys, RROR full skid,
RK 2.5 max travel pro with RRDs, 37" Nitto Trail Grapplers, Tera 44 front, Tera 60 rear with 4.88s