The Kooks system goes on with the stock K-member and motor mounts.
I'm not sure but I think they changed the JBA to fit with the stock mounts? You used to have to, or at least it was recommended, to get the Steeda AM mounts...
It is a pita to get them on from under there and a lift is strongly recommended!
Plan on 4-5 hours of labour if you have them installed... prolly double laying on the drive way...??
Too add the mid pipes (removing the cats) is an easy swap, again I don't know on the JBA system but on the Koos system they're separate... just ~2 feet of high grade SS piping with the hangers welded on...
Kooks testing shows a 7-8 RWHP gain with the off-road pipes over the catted pipes, a total gain of close to 30 RWHP!
KJ, poorer but happier
Fox Lake Racing
Power House 411
Sun Coast Creations