I visited a shop and inquired about an Apex-i PFC, according to them there isnt a unit that suits my car. So we then had a look for another brand a GREDDY stand alone but apparently this unit was also incompatible for my car, it being automatic. So now they are suggesting that the only unit i can fit in my car is a GREDDY E Manage. ( Piggy Back!) My Reply was "ahh uhmm No Thankz! Maybe Later." I want a Stand alone unit as i will be chasing more HP down the drack. Still my dillema is finding the most suitable unit for my GTSt Automatic S1. According to many Apex-i is the best selling unit in the market and that is why im keen on em. Just need to know if it is possible to chuck one in an Automatic. Im from Adelaide do any of you guys know any good mechanic from down here? A fellow from a Nissan dealer suggested WILLALL RACING, i've read some tech stuff from magazine and they have been mentioned a few times.