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Discussion Starter #1
Maybe a silly question but do the HKS dump valves have an adjuster for the amount of dump.. i.e to make it quieter or louder.. just noticed a big nut on the top of mine that looks like it might be adjustment for something? or it possibly just holds it all together!!

Lee
 

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when i had a my HKS SSQV on my GT4 & MR2 Turbo you could adjust the bolt on the back and it would alter the sound....i also put a purple insert into it and that changed the sound...my mate had a gold insert and that made a much louder noise....there relatively cheap to buy worth a go....
 

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Discussion Starter #3
So the bolt probably gives a bit of adjustment then? I will try tunring it and see!! Cheers

Lee
 
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