1) Link to the Mazdaspeed 3.
http://www.aquamist.co.uk/vbulletin/...ead.php?t=2197
2) The pre-amp is for IDC not map sensor. Map sensor range is fixed for 2.5 or 3.5 MAP sensor.
3) The kit comes with standard nozzles (no checkvalve). There is no advantage to use checkvalve unless the application demands it.