A freakin' EGR valve on a 94-95. I did a guy I work with's tonight, and absolutely hated it. Everything went a lot easier after I dropped the Y-Pipe, and took the tube off from the bottom though. That engine was definately not designed for easy maintenance, that's for sure. BTW: He has over 270,000 miles on the car, and besides the EGR valve, the engine seemed to be in pretty good shape. Bad converter shudder though.