when you turbo a car you essentially presurize the system (meaning the turbo pushes air into the intake via ic piping) the bov will release that pressure when you let off the gas thus producing the sound that you hear (its nothing more than blowing up a balloon and popping it in a retarded since) different bov's produce different sounds, hks makes a couple inserts for their ssqv's that will make different sounds, then you have stuff like the RFL's, etc that are Real Fucking Loud, hence the name....or you can put a turkey call on it and irritate the shit outta people at walmart
with the purple insert iircOriginally Posted by BenefitX
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