Aftermarket Exhaust in Washington
Vehicle type: Truck
Conditional
Aftermarket exhaust systems are allowed but must include functional mufflers, maintain catalytic converters, and not exceed 95 decibel sound limits.
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Frequently Asked Questions
Are aftermarket exhaust legal in Washington?
Aftermarket exhaust systems are allowed but must include functional mufflers, maintain catalytic converters, and not exceed 95 decibel sound limits.
What are the aftermarket exhaust limits in Washington?
Aftermarket exhaust systems are allowed but must include functional mufflers, maintain catalytic converters, and not exceed 95 decibel sound limits. For specific numeric limits and thresholds, see our full compliance report.
Are there exceptions for aftermarket exhaust in Washington?
Yes, there may be exceptions and exemptions. Get the full details including medical exemptions and edge cases in our compliance report.