Lethal, i just got a trust system from Evo R, it is the 4" version though... without the silencer in its very loud. If you want to hear it let me know.
FYI, my car is a late '95 R33, stock except for the Trust airnx filter and Trust dump / system and it made 174rwkW at the last dyno day. If you check the exhaust out it is VERY straight, i'm guessing thats why it made such a good result... unless the ECU has been played with.
Also ask Ice Performance, they may be able to get Trust stuff a bit cheaper.