Hi pal, at present i have the gizzmo ms-ibc boost controller which has 6 settings boost spike multi scramble etc etc,, But i only have it on like 2 settings high and low at the minute,, on low its round about 1.2 bar and high its touchin over 1.4, some say 1.4 on 4 engine isnt good, but to be honest before the ecu change and injectors i was hitting 1.5 near on my hks boost gauge, and there were no problems as it was running like that for a year or so and as sweet as a nut,,
as for the exhaust its a true 3" magnex turboback going into a back box with 4" rolled tip,, that was on the car before i got it, im not too sure about the turbo elbow!!
i hope that all makes sense to you, it looked ok as i was typing it all out lol