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huge performance improvement -740turbo air box modification

posted by  darylrobert on  Thu Sep 10 00:08 CST 2009
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last visit: Tue Aug 31 21:21 CST 2010
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The easiest performance improvement to any Car. Not sure why Volvo designed the air filter box to perform so badly. Adding ducting from spoiler to air box has made a huge improvement to performance, next is a K&N filter.

note: thermostate & assembly removed, hot side left to vent (may block 4 summer)






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