Modified X-trail system.... or was it the WRX system that was made to suit?
There is another system out there called Liquajet which is made by Alternative Fuel Innovations. Unfortunately they do not go into detail about their system on the website
If you want to find out more about this system, talk to Ash and Frankston Gas Conversions (03 9786 1546).
I don't know the differences between the JTG (European design) and the Liquajet (from all accounts an Australian design) systems, but when speaking to Ash, he was more than happy to install a Liquajet system to suit your power requirements (I was asking him for around the 600hp mark - no probs for the injectors, just need a second pump in the tank).
Awesome, thanks!