The intakes are one thing, was not around for the G37 and that, but the exhaust is actually the same design. After many were sold an issue came around, which did not even affect everyone. They made a small adjustment to fix this issue, so it is more like 1.0 (minor issue), 1.1 (no issues).
Note, this is all just for the 370z exhaust.
Also, Stillen exhaust still holds the most proven gains so far for exhaust alone.
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