Fairlady: ill be the first to tell you I have heard from several sources that the evo-r rear diffuser has less than par fitment. Ontop of that im not keen on the what appears to be a rather dramatic "cup" of the exhaust tips; the top secret one looks a little more compact, and I intend to use the vortex's that are provided with the top secret diffuser that are not provided or even an option to my knowledge with the evo-r iteration.
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