Very nice. I suspect the down pipes are responsible for the bulk of these gains. The exhaust is likely less than 15% of the difference.
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2017 Porsche 911GTS - Agate Gray on Black
2009 Aston Martin DBS - Casino Royale Gray on Black (sold)
2014 M5 ZCP - Azurite Black over SSII Full (gone)
2009 M5 - Carbon Black over Sepang Full (gone - not forgotten)
2001 740i M-Sport - Carbon Black over Black (gone - not forgotten)
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