I installed a used Forge Ram Dump blow off valve on my supercharger setup. This BOV has a nice little "POP SSSSS" sound while cruising around. It is not the loudest, but has a unique sound at low rpm's.
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More than likely the Valve needs a service kit. After the service it may sound different and perform better.
Explaining the sound at a low rpm
gearing down transistion
High rev fix the audio and add.
more information about this bov.
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