It is pretty hard to defeat the MP db test, as someone has tried every trick before, and they have someone on board the boat being tested to insure that the boat is tested at full throttle and at half throttle, and that the exhaust does not have an operable switchable exhaust. The only way to beat it would be to spend the money for better mufflers for the test and then remove them, although I am not sure why someone would waste that kind of money. I spent $2000 to add mufflers to my boat when I brought it to the lake from the midwest 3 years ago, and I don't have the extreme high performance racing engines that some have on the lake.
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