I used to have an ARC bov on my rev 2.
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.
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.it didn't often whoosh, only at high boost levels and it wasn't very shrill or loud when it did.
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.
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.
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.at lower levels it fluttered away nicely, making more of a fluttering inward gasp sort of noise.
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.lol.
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.bit like the
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"squirell mincer" on the top gear edition with the prodrive car.
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.
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.
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.I wish I hadn't sold it.
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.
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.I have seen a couple for sale on here for around
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£80.
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.
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.
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£300 new from Japan.
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