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I am having a Blitz type VTA BOV installed today. I see a screw on top of it. Does that do anything?
Thanks
 

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Working OT
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Usually changes the sound a little bit nothing major though.
 

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Akai Suisei - 赤い彗星
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I am having a Blitz type VTA BOV installed today. I see a screw on top of it. Does that do anything?
Thanks
It, changes the spring pressure.
 

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feeding your habit
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the spring on the BLITZ DD basically adjusts how much pressure it takes to crack the valve. If you want more sound adjust it one way, less sound adjust it the other. Be sure to set the locking nut when done.

How does it look installed?
 
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