Greddy Type-S (no whistling)

Here's my Greddy Type-S and playing with it at low Boost and high Boost.

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Greddy RZ Blow-off valve on RB20DET
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bov - test (greddy type-s and HKS ssq)
sound test with two blow of valves, greddy type-s and HKS ssq, both Vent to Atmosphere in eclipse gsx (DSM).... WATCH MY OTHER VIDEOS!!!! =)

500HP Greddy Twin Turbo 370Z Review - Car Dies...
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Greddy Type S blow off valve on skyline
This is the sound of my Greddy type S dump valve and my HKS hi flow air filter on my skyline r33 GTS-T