Well, on thursday me and a buddy are going to be installing the new exhaust on my 1990 LX. We're putting in BBK unequal shorties, BBK O/R H-pipe, and Flowmaster A/T catback. I've already got a good set of copper header gaskets for the header install, and some spark plug loom to make sure that the wires will be out of the way of the new headers. Is there anything to check while this stuff is off, I'm thinking check o2 sensors for sure, anything else? After the install, what type of testing/break in should be done? I think I've read that having no cats will effect the computer right after the install, is this true? Any advice/tips from you guys is appreciated, or if you have a good site or 2, post em up here.