I just installed them on my LJ last weekend. I bought a pace setter mid pipe from rock auto. I was really impressed with the quality of that pipe. I was able to clean up the old hardware enough to use it but I put the new studs In anyway. I just pushed them thru the top of the manifold flange and used an oversized nut as a spacer to suck them down in. I wasn't able to get a socket on them though so I had to tighten the nuts up with a stubby boxed end wrench. I think the new pre cats were a little larger than stock which made it a little tough. This was the first time installing exhaust myself without having any leaks.
Ps. Sry for rambling on.
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