mani reckons it helps.
yes mate. they work. far as i know they have a standard map to advance ignition timings with revs, people say this variation can be changed. I bought mine from a fella on here, fitted and i could feel that normally, when i took the turn off the main road and onto my drive i could just use 3rd gear at low speeds, after the icon chip, i had to go down to 2nd otherwise it would stall, but when booting it, there was a significant kick after 3500 rpm, very noticeable in 3rd gear. so if u have one lying around, fit it, but solder ur connections to get better contact. hope this helps