This should help http://www.ephatch.com/forum/showthread.php?t=43626
Since you'll be removing the cat too you'll need an O2 sensor socket to amke it easier on yourself. Plus you'll need an O2 sim or defouler to keep from throwing a CEL. And if your cat is anything like the rest of ours it is prolly rusted to the mid pipe. You'll either need a ton of pb blaster and a torch or just cut the bolts off and drill them out. And a donut gasket from the cat to the mid pipe.
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