If you haven't found out already; yes, there is a difference. Like you stated, the headers and the down pipe
are completely different. Other than that, I think the Cat/Test Pipe is shaped differently, Pretty sure the H/X
pipe is shaped differently, but I think the shape after the H/X pipe which is the muffler section is shaped the
same. Ebay parts are actually harder find for this car unlike most cars. I would just say search around on
the internet and on forums and see what other people have done. There are so many more parts for the
Turbos and it makes it difficult on the NAs. Hope I helped a little bit. Asa - 91 300ZX Twin Turbo.
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