Aftermarket Exhaust in Rhode Island
Replacing the exhaust system is legal in Rhode Island, 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 · September 2026
What the law says
Replacing the exhaust system is legal in Rhode Island, 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. Removing the catalytic converter is prohibited by federal law (Clean Air Act § 203) regardless of state rules. An exhaust is deemed defective if modified to produce a louder sound than the manufacturer's original equipment. Biennial safety and emissions inspection applies.
Specific Limits
- Cutouts
- prohibited
- Muffler required
- Yes
- Louder than stock
- prohibited by statute
- Catalytic converter
- removal prohibited by federal law
Exceptions & Exemptions
Must maintain factory emissions equipment including catalytic converter. Muffler required to prevent excessive noise. No cutouts or straight pipes allowed.
Frequently Asked Questions
Are aftermarket exhaust legal in Rhode Island?
What are the exact aftermarket exhaust limits in Rhode Island?
Are there exceptions for aftermarket exhaust in Rhode Island?
Street-legal aftermarket exhaust picks
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