No, Tennessee prohibits exhaust systems producing excessive noise under state law and local ordinances, with enforcement by the Tennessee Highway Patrol and municipal police. Violations may result in citations or vehicle impoundment, particularly in urban areas like Nashville and Memphis. Federal EPA standards also apply to aftermarket modifications.
Key Regulations for Loud Exhausts in Tennessee
- State Law (T.C.A. § 55-9-402): Exhaust systems must not emit noise exceeding 92 decibels when measured from 20 feet away, aligning with federal Motor Vehicle Safety Standards.
- Local Ordinances: Cities such as Nashville (Metro Code § 12.28.030) and Knoxville ban modified exhausts deemed “unreasonably loud,” with discretionary enforcement by local law enforcement.
- 2026 Compliance Shift: The Tennessee Department of Environment and Conservation (TDEC) plans stricter decibel testing for modified vehicles, effective January 2026, targeting aftermarket parts not meeting EPA noise limits.
Enforcement prioritizes vehicles with straight pipes, cutouts, or bypasses, especially in residential zones. Repeat offenders face escalating penalties, including fines up to $250 and mandatory exhaust system repairs. Dealers and repair shops must certify compliance under TDEC’s 2025 guidelines.