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Old 02-03-2012, 02:57 PM
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Location: Brisbane, Australia, Q
Cobra Make, Engine: Contemporary CCX3117 427FE
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Mike's point about choking the motor has two edges to it as well. If someone was inclined to insert a drilled disc at the collector to retain a bunch of steel wool for the purposes of a dB test - hypothetically - you will obviously lose performance but will also heat the exhaust valve and possibly blow out exhaust gaskets.

Short drive at low rpm for the day is one thing.
Sustained driving to get to the dB testing facility - look at towing it there.
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