The finished works amazingly well off-road without giving up any of the WJ’s good on-road characteristics. Clayton recommends a CV rear driveshaft. For now we’re running the stock rear shaft and there are some minor vibrations, so an upgrade is probably in our future. Also the huge factory muffler has to go for upper control arm mount clearance. You will either need go with a new muffler and tailpipe, or do what we did and simply add a turn-down after the cat. Our WJ now has a throaty rumble that’s surprisingly not too loud.