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Old 08-29-2010, 06:38 PM   #8 (permalink)
G Fo12ce
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I don't have the chart laid over the stock at the moment but on mine (NISMO model) the HKS made a small gain all the way through over the factory NISMO exhaust (which already has the better section 1). Peak was 305.1 HP & 249.8 TQ at the wheels on a rainy day and on a Dynojet. Average was about 5 HP higher than the NISMO exhaust. Sound DB level was below 95 DB (for all states that comply with CA law on that). 98's dyno may be more apples to apples for you though.

Sounds very nice but not annoying in any way due to the sub silencers and looks aswesome. Tips are adjustable in lenght as well so it's nice for guys who are running the diffusers and rear skirts.
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