Aftermarket Exhaust in Wisconsin
Vehicle type: Suv
Replacing the exhaust system is legal in Wisconsin, but a muffler in good working order is required and cutouts or bypasses are prohibited. Modifications that make the exhaust louder than the originally installed muffler are specifically prohibited.
Verified against primary sources · August 2026
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Frequently Asked Questions
Are aftermarket exhaust legal in Wisconsin?
What are the aftermarket exhaust limits in Wisconsin?
Are there exceptions for aftermarket exhaust in Wisconsin?
Street-legal aftermarket exhaust picks
Gear that helps you mod without a ticket in Wisconsin.
Cat-back systems keep your emissions equipment intact — the compliance-friendly route.
Decibel meter →Measure your exhaust at the test RPM before a fix-it ticket does.
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