100DB Track Limit
A new local track requires the noise level to be under 100DB directly behind the car at and 95DB on some corners but with a bit distance. I currently have FI LTH and CBE with 18" resonator but it's still too loud, any idea on how to quiet it down without sacrificing power? I also have the side pipe welded to the muffler to reduce the drone at about 3k rpm, but that doesn't really do much at high rev. Thanks in advance.
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Current: 2015 C200 / 2018 Cayenne / 2012 370z / 2012 C250 Coupe
Gone: 2013 Cayenne / 2004 Cayenne S / 2003 SL55 AMG / 2008 C300 / 2006 350z / 2006 C280 4Matic
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