Here we go again. I posted a question to you the last time you started a thread like this in the Parts Wanted section,
R33 GTR exhaust wanted
and I've been checking every day since, but you didn't answer. Until now. Thank you.
I have a double stainless system on my 33 which sounds quite well-mannered, and have asked a well-known UK garage in the south to fit a Titanium one instead which was sent over from Japan. They have not done anything yet. If the titanium one is not too OTT noisewise, (my daughter likes the quiet one) I might be willing to let the stainless twin go to you... but this is all still theory at the moment.