92-95 civic ex/si, 93-95 del sol si have the p28
the auto DOES matter, but it too can also be chipped to work with a manual if necessary, but p28's are so cheap and abundant, that finding a manual for around $125 is easy.
no matter what "off the shelf" chip you plan to get, i higgly suggest you get a vafc and head to a dyno to tune it. E picked up almost 20 hp in the midrange and 10 mpg on his itr with a skunk2 p28. they just run way too rich.