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this is a quote from another threadtarantula said:presure valve release *very hard to explain gota see* basically whenever my car reaches 6000rpm all exess presure is released out of the valve witch is placed at the bottom of the car *where the manifolds meet*
it actually sounds nice as it a BOV sound, sometime i force more outa each gear till the car valve bouce witch only ends up in hearring the valve opening and releasing presure *not constant but it would let presure out. stop. and once presure builds up again it will release it again. it dose it around twice per second*