Yea as Nick said any workshop can do it.
or try doing it yourself.. See this DIY tut: http://www.skylinesaustralia.com/forums/in...howtopic=116520
You will need aftermarket ecu and have the maps changed abit.
Nick FYI I DO NOT need a plug.
Tropper: Did you want me to pick up yours if/when Im down at Justjap since you live pretty close to me.? PM me.