The one that you saw on ebay is exactly the same as the Blitz Nur-Spec. The only difference between the two system is the muffler. I never try the Nur spec style one because when I bought mine, it was out of stock.
Also, the N1 style one doesn't not look exactly like the N1 because the muffler is not mount at an angle. So, it may looks weird.
The build quality is excellent, mounting hangers is very well welded on the muffler. But the only problem is that the muffler will hit the bottom of the rear bumper, but all you have to do is to bent the stainless steel hanger a bit ( It is really hard to bent those suckers ! )
Sound .... it is not very aggressive, I consider it as loud as the N1 ( both without silcencer ) but in a depper tone. I will rate it 9 out of 10 where as comparsion to Apexi GT-spec which is 10 out 10. <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/biggrin.gif" border="0" valign="absmiddle" alt='
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