I don't think K&N makes a filter for the Tempo, but you can do as I did and cut down a Mustang filter to fit. I cut the rubber seal off one side and end, removed enough screen and then glued the whole thing back together with silicone sealer. It has been working fine for over a year.
Changing to synthetic oil is worth a few HP and will clean up the inside of the engine. You can try advancing the timing a few degrees, but I found my wife's '93 to be extremely sensitive to timing.
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