US EPA: Fact Sheet: Exhaust System Repair Guidelines, March 13, 1991

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

JavaScript appears to be disabled on this computer. Please click here to see any active alerts.

US EPA: Fact Sheet: Exhaust System Repair Guidelines, March 13, 1991

Enforcement