I had these headers on my other CJ and have now put them on my new one. The problem is where the 3 collector bolts go in to connect it to the exhaust. The very top hole has pretty much ZERO room to get a bolt in there. I did finally get one in after hitting the crap out of it, but it's a much shorter bolt than the other ones and therefore I cant double nut it to keep it from coming loose like collector bolts do. I have to hold the bolt head with my finger and tighten the nut with a ratchet because there is a bellhousing rib in the way. The only thing I can think to do is grind the the rib and some of the bellhousing off to fit the right length bolt in there and have proper room to tighten it with a wrench. Oh and the collector gasket is leaking because of it. I don't know what the deal is, my other CJ had no problem with this, it was tight also, but I had working room. Also my other CJ had a 4 inch lift as opposed to this one having 2-1/2'' lift. Which thinking about it now may have given me more clearance?