TwinTurbo.NET: Nissan 300ZX forum - I took measurements after the California muffler hype this
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Subject I took measurements after the California muffler hype this
     
Posted by bbug on October 16, 2019 at 5:15 PM
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In Reply To Anyone have some decibel readings for 3inch exhaust? posted by Adamo on October 16, 2019 at 08:41 AM
     
Message past January. I used a sound meter, taken 19 inches from the exhaust.

My old Z on full 3” TT with SpecialtyZ single tips was 89 db at idle and 99 at 3k rpms.

My TT with 3” downpipes and 3 to 2.5 SpecialtyZ quad measured 77 db at idle and 88 at 3k.

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