hi alex,i was told by the ozzies to use a 4" dump pipe down to the gearbox then reduce to 3.5" its coming out of the rear of the turbo where its most important, done 8000 miles in mine now no issues..berniethats the turbo i am going to use!!
you say it will run on my 3.5inch exhaust????
i was told to upgrade it to a 4inch job