TwinTurbo.NET: Nissan 300ZX forum - I think they are. But there still is that rasp/resonance
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Subject I think they are. But there still is that rasp/resonance
     
Posted by MixManMash on April 26, 2014 at 8:16 AM
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In Reply To Side note posted by OverZealous (CT) on April 25, 2014 at 05:38 PM
     
Message at the 2000-2500RPM range under load. I recently changed my test pipes/cat back to a full SZ 3" system with large resonators in the test pipes from a 2.5" system (3" - 2.5" test pipes, 2.5" cat back with resonated x-pipe). The sound is deeper overall and it has eliminated the rasp/resonance.

     
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