Down load the app, so we can compare (somewhat) at least idling decibels.
My 87 with Bursch 1 5/8 headers and an M&k 2 inti 1 idles at 70 dB +|- 3 about 5 feet away from left side to right side of the rear. 
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87 911 coupe, GP white, cashmere/black
64 Alfa Romeo Giulia TI - the violin
89 Peugeot 505 Turbowagon-other Pcar
67 912 coupe, white, sold
04 Audi Allroad 2.7T
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