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I just found this on the Michigan snowmobile regulations on FISHWEB.
Noise: Each snowmobile manufactured after July 1, 1977, shall be equipped with a muffler that does not exceed 78 decibels of sound pressure at 50 feet as measured by the 1974 SAEJ-192a.
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2002 CHEVY SILVERADO Z71 4/dr EXT CAB
ARCTIC CAT
04 FIRECAT F7 EFI Carbon Tech Reeds,Black Magic can,Simmons Flex-Skis
05 FIRECAT F7 EFI W/Reverse,air intake
Worthington Flip Top Trailer
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