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Old 03-26-2019, 08:23 AM   #142
70chevelleSS
 
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Drives: 2017 Camaro SS 1970 chevelle SS
Join Date: Oct 2016
Location: Florida
Posts: 231
Flowmaster American Thunder Dual Mode Axle-back (NPP) for 2016+ Camaro SS & ZL1

Quote:
Originally Posted by KingLT1 View Post
That is how mine sounds with the valves open. My complaint is when the valves are closed, they don't seal and make a hissing sound.

https://youtu.be/rMmg8eJdqC4


Yea mine definitely doesn’t sound like that when closed. I wonder if your valves have gotten dirty somehow or collected buildup which may keep them from fully closing?

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2017 camaro SS A8
FBO With all porting and tuning done by PRAY
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