| 5 years ago: Stillen (w/ stock (I think) cats): 85 dB-A B & B (2.5", test pipes): 96 dB-A LaBree w/ high-flow cats and big LaBree resonators: 89 dB-A LaBree w/ high-flow cats, no resonators was: 93 dB-A [ http://twinturbo.net/nissan/300zx/forums/general/view/1318969/Stillen-measured-11-dB-quieter-than-25-B-amp-B.html ] [ http://www.twinturbo.net/nissan/300zx/forums/general/view/1407841/Our-test-results-more-inside.html ]
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