Exhaust Decibel Limits


Both cars and motorcycles with aftermarket exhausts or exhaust pipes typically catch the attention of law enforcement agents seeking to clamp down on overly loud systems in communities and neighborhoods. Many times the effort is boosted by homeowner and business complaints. However, a certain amount of noise is legal in many jurisdictions, regardless of personal opinions.

Noise Source

  • Sound carries by the change of air waves. Exhausts are designed to dampen the engine sound created from combustion. If there was no exhaust pipe, engines would be too loud for normal hearing within 50 feet. However, sport exhausts create additional pressure by design, which then creates louder engine cycle sounds.

State Regulation

  • The Environmental Protection Agency sets standards for exhaust manufacturers, which is seen by a product stamp on exhausts. However, it is states that frequently legislate noise limits on upper tolerances of exhaust sound. Some restrict pipes to what the EPA has approved. Others follow arbitrary noise limits passed in law regardless of the circumstances.

California Example

  • California enacted an arbitrary limit capped at 95 decibels with the engine running at between 3,000 and 5,000 RPM. Because evaluation of the noise produced can be hard to prove on the street, the law allows for the vehicle owner to have the exhaust tested for a definitive noise certification if cited.

Related Searches


  • Photo Credit Jupiterimages/Photos.com/Getty Images
Promoted By Zergnet


You May Also Like

  • Legal Exhaust Noise Levels

    Motorcycle exhaust volume is regulated at the federal level, and may also be regulated by individual states. Open pipes (also known as...

  • How to Tell if an Exhaust is Too Loud

    Automobiles often play a big role in producing noise pollution. Engines and exhaust systems can be noisy machines, but cars can get...

  • How to Use a Fence to Reduce Noise

    Noise can come from a host of sources, including cars traveling on the highway and neighbors playing loud music. The U.S. Department...

  • OSHA Decibel Limits

    Occupational hearing loss is one of the most common workplace injuries, according to the Centers for Disease Control. The CDC estimates that...

  • Exhaust Noise Regulations

    The topic of exhaust noise is an involved one. Over the last 30 years or so, federal, state and local rules and...

Related Searches

Check It Out

How To Travel For Free With Reward Points

Is DIY in your DNA? Become part of our maker community.
Submit Your Work!