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Old 08-03-2012, 03:10 AM
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Location: Westerly, RI
Cobra Make, Engine: Fordstroker 408w custom solid roller-Craft ported Brodix 17*heads-CFM ported Vic Jr. intake-1 3/4 primaries- 575hp-TKO-600RR Liberty upgrade- -Moser 8.8 trutrac-McLeod Street Extreme--QA-1-Wilwood brakes, Classic Chambered 3" Cobrapacks, Avon's
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I took an industry standard reading at .5m or about 20” away from the tip of the exhaust on the same plane at a 45 degree angle, (A) setting on asphalt. I have louvered mufflers installed backwards.

idle 95dB
3000rpm 110dB
At 10ft away idle same plane and angle 85dB
At 20ft away idle same plane and idle 80dB
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