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Old 03-03-2025, 09:09 PM   #13
2016ghost
 
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Drives: Chevrolet Camaro
Join Date: Sep 2024
Location: Kentucky
Posts: 24
Well, I guess I’m going to go see if the dealership will check the NPP exhaust valve settings on my car. Driving around it seems they are either open all the time or closed all the time depending on the selection I make. Stealth is quiet and touring, sport, track sound to be open all the time. Still would like to find a scanner that can be used to set them or is HPTuner my only hope?
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