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Build a couple of helmholtz resonators and install them in parallel with your cherry bombs. You will be able to tune out what, to you, is the most annoying frequency, and some of those adjacent to that one will diminish or be eliminated.
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2000 Boxster S
2010 Volvo XC60
2011 GMC Denali HD 6.6L (sold)
2008 Cayenne S (sold)
1989 Targa (sold)
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