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Exhaust Pre-Silencer Variable DesignTekFits:Porsche 911 2.7L / 3.0SC / 3.2 Carrera 1974-1989 DesignTek new Variable valve pre-silencer. The variable electronic valve allows you to open or close the air flow Between 20% to 100% this will noticeably change the sound of the exhaust and is flexible to your needs. T304 Stainless steel with polished showcar mirror shine. Fits cars with or without oxygen sensors.
