Exhaust Noise in Montana
Vehicle type: Suv
Montana caps exhaust noise at 95 dB for all motor vehicles except motorcycles and quadricycles, measured under SAE J1169. A muffler in good working order is separately required and cutouts are prohibited.
Verified against primary sources · August 2026
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Frequently Asked Questions
Are exhaust noise legal in Montana?
What are the exhaust noise limits in Montana?
Are there exceptions for exhaust noise in Montana?
Street-legal exhaust noise picks
Gear that helps you mod without a ticket in Montana.
Measure your exhaust at the test RPM before a fix-it ticket does.
Exhaust silencer insert →A removable insert that brings a loud exhaust back under your state's limit.
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