No, Oregon prohibits exhaust systems producing noise exceeding 92 decibels (dB) when measured from 50 feet away, per ORS 815.210. Local jurisdictions like Portland’s Bureau of Transportation enforce stricter limits, with fines up to $250 for violations. Recent 2026 amendments to Oregon’s vehicle code empower law enforcement to impound vehicles with modified exhausts during traffic stops.
Key Regulations for Loud Exhausts in Oregon
- Decibel Limits: State law caps exhaust noise at 92 dB at 50 feet; Portland and Eugene enforce 88 dB thresholds. Measurements use SAE J1169 standards, requiring calibrated equipment.
- Modification Restrictions: Aftermarket exhaust systems must retain factory-installed mufflers or equivalent sound-dampening technology. Tampering with emissions controls violates both noise and environmental statutes.
- Enforcement & Penalties: Violations trigger fines escalating from $115 to $250 for repeat offenses. The Oregon Department of Transportation (ODOT) collaborates with local police to conduct periodic noise compliance checks, particularly in urban areas.
Local ordinances may impose additional restrictions, such as prohibiting “excessive noise” under municipal codes. Vehicle owners should verify compliance with both state and city regulations to avoid penalties.