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Discussion Starter #1
I bought this GTR specific kit from perfectrun.com and it came with all the GTR hardware in a sealed HKS box....so it's not a fake.Is this a new design?I thought these were adjustable?
 

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As far as I know , you can change the 'fin' insert to adjust it.
The gold insert sounds quieter than the purple insert though.
 

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Discussion Starter #3
Those fins sdjust the sound......what about the pressure?I am just running standard boost
 

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The one's I've seen always have a screw on the back and are adjustable. Yes, you can replace the fins for different sound but that's the first HKS one I've seen with no screw...
 

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The most recent batches have no adjusters.
They are identical to the £25 ebay specials, apart from packaging.

Rob
 
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