Daysyore Universal 2.5" Inlet/Outlet High Flow Catalytic Converter W/O2 Port 410250

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Vehicle Info Required to Guarantee Fit


  • Professional installation is highly recommended.
  • It is legal if your vehicle meets Federal EPA standards ONLY.
  • It is disabled if your vehicle is registered in CA, NY, CO & ME.
  • It is available if your vehicle meets California requirements, but is not registered in CA, NY, CO & ME.

Check Before Replacement

  1. Retrieve / repair all PCM trouble codes and updates.
  2. Repair all exhaust leaks and internal coolant leaks.
  3. Check for fuel control.
  4. Ensure the battery is disconnected before welding.
  5. Ensure the full and correct parts for use.

How to Replace

1. Cut the original converter out.
2. Measure and check if the size fits your vehicle.
3. Weld the new converter into place.
4. Reconnect the oxygen sensor.
5. Start engine and check for exhaust leaks.

Chevrolet Impala 2002-2009 3.4L-5.3L
Chevrolet Monte Carlo 2002-2007 3.4L-5.3L
Chevrolet Equinox 2005-2006 3.4L
Chevrolet Uplander 2005-2006 3.5L
Chevrolet Astro 2002-2005 4.3L
Chevrolet Camaro 2002 3.8L
Ford E-150 2005-2007 4.6L
Ford E-250 2007 4.6L
Ford E-150 Club 2005 4.6L
Pontiac Grand Prix 2003-2007 3.8L
Pontiac Montana 2005-2006 3.5L
Pontiac Torrent 2006 3.4L
Pontiac Bonneville 2003-2004 3.8L
Buick Terraza 2005-2006 3.5L
Buick Century 2002-2005 3.1L
Buick LeSabre 2002-2009 3.4L-5.3L
Buick Park Avenue 2002-2005 3.8L
Buick Regal 2002-2004 3.8L
Jeep Grand Cherokee 2005-2006 5.7L
Cadillac DeVille 2002-2005 4.6L
Cadillac Eldorado 2002 4.6L
GMC Safari 2002-2005 4.3L
GMC Sonoma 2002-2003 2.2L-4.3L
Audi S8 2002-2003 4.2L
Shell Material T409 Stainless Steel
Weight 1.8 kg/ 3.5 kg
Part Number 410250
Year 2002-2009
Make Chevrolet/Ford/Pontiac/Buick/Jeep/Cadillac/GMC/Audi
Warranty 12 Months

Returns Policy

Thanks for choosing Daysyore. All of our Daysyore products are strictly tested by our quality inspection team before shipment, if you find any quality issue, please email us at

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

The refund will be processed within 7 working days after the receipt and validation of return. Please check your account then.


Do you ship internationally?

NO, We have our own warehouse in the United States and we only ship to the United States.

How much is the shipping?

Free shipping on all items

Shipping method?


Shipping Time?

Processing time: 1-3 Business days

Shipping time: US: 3-5 Business days

Will this fit my car?
The product fits 2.5'' inlet / outlet, and there is a compatibility list as a guide on the page of Vehicle Fitment for you. If you are still uncertain, please contact with the customer service.

O₂ sensor plug direction? pre cat or post cat?
The cat isn't directional, so you can flip it around either way, as long as the O₂ sensor plug is conveniently located with the O₂ sensor.

Is it approved by California?
Sorry, no. It is prohibited from sale in California, Colorado, Maine, and New York due to State emissions regulations.

Welded or flanged?
Just installed to existing exhaust system, both ends may require cutting and / or welding, please better ask for professional assistance.

What to do if check engine light comes on?
Ensure that the gas and oil caps are on tight and that the oil dipstick is seated correctly. If the light remains on, it could be triggered by a faulty oxygen sensor, wrong installation of catalytic converter, bad spark plugs, malfunctioning thermostat or bad mass air flow sensor. If none of the above is true, please contact with the customer service ASAP.

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