I have a set of AC Delco wires and O2 Sensor that I have still in packaging, lost the sales reciept so can't return them ( will lose too much money) They were for a 1988 Z24 2.8L, but I ended up getting rid of the car before I got around to installing this stuff. Most of the time this is all that is needed to pass an emission test, will each item for $60 each or $100 for both.