"A blowoff valve (BOV) or dump valve is a pressure release system present in most turbocharged engines. Its purpose is to prevent compressor surge, and reduce wear on the turbocharger and engine. Blowoff valves relieve the damaging effects of compressor loading by allowing the compressed air to vent to the atmosphere, making a distinct hissing sound"
And the reason its in italics and quotation marks is that I copied this directy from somewhere else (before anyone accuses me of being a Peril-ian expert)
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