i think euro spec 323's are able to do the golf tee mod
i got reading about exhausts etc and stumbled across the golf tee mod by which you plug up the vaccum that controls the flap in the right exhaust pipe. I saw that it was only for 330's but i had a look at my exhaust anyway. On my right exhaust pipe, inside there is a flap that was open when my car was off and closed when it was idling. Im gona do the mod in the next few days and see how it goes. Heard that doing this will give it a bit of extra sound below 3000rpm before it opens up agian.