Exhaust Noise in Indiana
Indiana sets no statewide decibel limit for passenger cars. A muffler in good working order is required, exhaust may not produce excessive or unusual noise, and cutouts or bypasses are prohibited.
Verified against primary sources · August 2026
What the law says
Indiana law is qualitative rather than numeric: A muffler in good working order is required, exhaust may not produce excessive or unusual noise, and cutouts or bypasses are prohibited. Despite the chapter's name, no decibel limit appears anywhere in it. A muffler or noise-dissipative device in good working order is required.
Specific Limits
- Statewide decibel limit
- none
Frequently Asked Questions
Are exhaust noise legal in Indiana?
What are the exact exhaust noise limits in Indiana?
Street-legal exhaust noise picks
Gear that helps you mod without a ticket in Indiana.
Measure your exhaust at the test RPM before a fix-it ticket does.
Shop on AmazonA removable insert that brings a loud exhaust back under your state's limit.
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