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boost82 · 04-29-2015, 04:47 PM

^It just makes your oem diverter valve stronger. Replaces the bottom portion/piston and spring, not sure about any sound increase I doubt there is a big one. Do you have an intake? You will hear the diverter valve more with a less restrictive intake

04-29-2015, 04:47 PM	#21
boost82 Private First Class 34 Rep 171 Posts Drives: M235i Join Date: Aug 2014 Location: New York iTrader: (0)	^It just makes your oem diverter valve stronger. Replaces the bottom portion/piston and spring, not sure about any sound increase I doubt there is a big one. Do you have an intake? You will hear the diverter valve more with a less restrictive intake
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