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Old 01-13-2013, 11:33 PM   #24

OzzySS's Avatar
Drives: 2013 2SS/1LE, 2004 Cavalier
Join Date: Sep 2012
Location: jax, FL
Posts: 1,337
stock exhaust, you barely hear anything...
NPP, you hear it when you open it up, and it's quiet at cruising rpms.
here's one of my vids from the dyno today for an example of the sound. the last time i searched on youtube, there was only one example of NPP, i think. my car is stock as far as performance mods, btw.
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