I emailed Corsa with questions about the sound level of their NPP compared to stock, here is their response
Quote:
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Reference: SKU: 14789BLK - I am interested in this product for my 2021 Camaro LT1 w/NPP, I understand the variability goes from 'Sport' to 'Extreme' sound levels and is a +12dB difference between Sport and Extreme. Do you all have the dB change from the stock NPP to the Corsa NPP system with valves open and closed? Any information or assistance is much appreciated.
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Stock NPP closed – 91.3 db
Stock NPP open – 94.0 db
Corsa closed – 97.5 db
Corsa open – 108.4 db
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Current: 2021 LT1 Camaro, 6spd, Crush, Corsa NPP, GMPP CAI, Soler Performance Throttle controller
Previous: 1997 V6 Camaro, 5spd, Black
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