Aftermarket Exhaust in Kansas
Replacing the exhaust system is legal in Kansas, but a muffler in good working order is required and cutouts or bypasses are prohibited.
Verified against primary sources · August 2026
What the law says
Replacing the exhaust system is legal in Kansas, but a muffler in good working order is required and cutouts or bypasses are prohibited. Removing the catalytic converter is prohibited by federal law (Clean Air Act § 203) regardless of state rules. Excessive fumes are separately prohibited.
Specific Limits
- Cutouts
- prohibited
- Muffler required
- Yes
- Catalytic converter
- removal prohibited by federal law
Exceptions & Exemptions
Muffler must be in good working order and prevent excessive noise. Catalytic converter must remain intact and functional on vehicles originally equipped. Cutouts, bypasses, or straight pipes that allow unmuffled exhaust are prohibited.
Frequently Asked Questions
Are aftermarket exhaust legal in Kansas?
What are the exact aftermarket exhaust limits in Kansas?
Are there exceptions for aftermarket exhaust in Kansas?
Street-legal aftermarket exhaust picks
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