Missouri Catalytic Converter Laws

Selling Catalytic Converters in Missouri

If you’re in Missouri and have a catalytic converter to sell, there are a few things to keep in mind. Missouri has passed laws aimed at reducing converter theft — but legal sales are still possible when you follow the rules.

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What the Missouri Law Says

Missouri treats detached catalytic converters as regulated scrap metal under Missouri Revised Statutes Section 407.300. Key requirements include:

  • Sellers must provide a valid photo ID and proof of ownership (such as the vehicle title or bill of sale).
  • Buyers (scrap metal dealers) must record the date/time of the transaction, the seller’s vehicle license plate number, and a full description of the converter, including weight and price.
  • Transactions involving detached catalytic converters must happen at the dealer’s fixed business location, and the converter cannot be altered or destroyed until the dealer has held it for five business days.
  • Records of such transactions must be retained for at least 36 months and must be available for inspection by law enforcement.
  • More recent bills (e.g., Missouri Senate Bill 785 & Missouri House Bill 304) propose even stricter rules, such as monthly reporting and class E felony penalties for unlawful possession or sale of a converter.

Can You Still Sell Your Converter?

✅ Yes! If your catalytic converter is legally owned and you can provide documentation, you can still sell it — even with Missouri’s regulations in place.

RRCats works with individuals and businesses in Missouri. We’ll help you with the necessary paperwork and ensure your shipment is compliant.

Selling to RRCats from Missouri

We make it easy to sell and ship your catalytic converter from anywhere in Missouri:

  • Text a photo of your converter and serial number for a free quote
  • Ship using your own box or request our pre‑labeled kit
  • Get paid by check, or PayPal — no hidden fees

Because RRCats is based in New Jersey, Missouri sellers can ship their converters out-of-state, avoiding the full local resale restrictions. We handle compliance and payment so you don’t have to worry.

Need Help?

Want to check your converter’s value or make sure it’s OEM? Visit our Cat Guide or text us directly with questions. We’re here to make your sale smooth, legal, and profitable.

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Please fill out the form below or text us pictures to get a custom quote for your catalytic converter.

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Check corners, under shields, and down pipes for numbers. Not all catalytic converters have numbers.
Drag & Drop Files, Choose Files to Upload You can upload up to 10 files.
To get a quote sooner, attach photos of any serial numbers and an overhead pic of the catalytic converter(s).
Drag & Drop Files, Choose Files to Upload You can upload up to 3 files.
Upload a Photo: Please include a clear photo of one of the following documents: Vehicle or equipment, Registration, Title, or Bill of Sale. Why do we need this? We are required by law to verify proof of ownership before purchasing certain equipment or materials to prevent theft and ensure lawful transfer. For more details, refer to New Jersey Scrap Metal Laws – N.J.S.A. 13:1E-99.12 (or insert exact link to the statute you want to reference). This requirement is mandatory to receive a quote.

Who Is RRCats?

Nationwide catalytic converter buyers

Fair. Consistent. Reliable.

“Their online system works great. Verifying ID and proof of ownership worked smoothly and gave me confidence that I was dealing with a reputable company.”

~ Customer, Mike K.*

“Very fast service! I submitted my info for a quote and got it the next morning. The only thing that was slow about the process was me packing it all up to ship out!”

~ Customer, Steven C.*

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