Exhaust Noise in Oregon
Oregon caps passenger-car exhaust at 94 dBA for pre-1976 vehicles and 91 dBA for 1976 and newer, using a stationary test at 25 feet under DEQ procedures.
Verified against primary sources · August 2026
What the law says
Motorcycles and mopeds have their own tiers (94/91/89 dBA) and other vehicles are limited to 92/88 dBA. A violation is a Class C traffic violation. Note the measurement distance — 25 feet stationary, not the 50-foot drive-by test other states use.
Specific Limits
- Measured
- stationary test at 25 feet per DEQ procedures
- dB limit cars
- 94 dBA pre-1976; 91 dBA 1976 and newer
- Other vehicles
- 92/88 dBA
Frequently Asked Questions
Are exhaust noise legal in Oregon?
What are the exact exhaust noise limits in Oregon?
Street-legal exhaust noise picks
Gear that helps you mod without a ticket in Oregon.
Measure your exhaust at the test RPM before a fix-it ticket does.
Shop on AmazonA removable insert that brings a loud exhaust back under your state's limit.
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