We do a brief cold start and throttle blip test comparison between the Nissan GT-R's factory exhaust and the new GReddy Power Extreme GS Stainless Steel exhaust. The only other exhaust modification is a MXP catless mid-pipe. The 80mm piping is a measurable upgrade from the factory piping and will yield solid gains when paired with any aftermarket mid-pipe. Sold and installed at Injected Performance, authorized GReddy dealer.
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