I just received my new Leo Vince Carbon Fiber exhaust for my 06 S3! As soon as I pulled everything out of the nice packaging, I could immediately tell that a lot of time, effort, and care went into the manufacturing of this system.
I weighed everything, and the total system came to 11.25lbs. When I take the stock system off, I will weigh it for comparison.
For those of you in Europe, this is an EC-approved product, as it has a removable "silencer", and it comes with e-pass documentation (this should mean something to you guys who are across the pond).
Anyhow...It will be a few weeks before I get it installed. I will take the bike into the tuner in stock form so that we can do a full run of tests comparing stock to modified. I will post results of full throttle runs, roll-on runs (partial throttle), speedo error, and top-speed readings. This is going to be done by Brock Davidson, one of the premiere tuners in the country. He did my R1 with spectacular results. His dyno-tuning sessions are typically all-day events...he is very methodic and thorough. Check out his "ZX-14 Diaries" on his website to get an idea of just how methodical he is.
Brock Racing
Here are a few pics:

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[ This message was edited by: tsc17 on 2006-07-01 13:49 ]