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Oh, yeah... did we mention, it's also illegal (fed) to swap out a functioning cat on a newer truck. If you ever get a hard a$$ tech inspection, a shiny new cat could open the door to a healthy fine.
Here's what the Feds FAQs say:
[SIZE=-2]UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
WASHINGTON, D.C. 20460
OFFICE OF AIR AND RADIATION
WHAT YOU SHOULD KNOW ABOUT USING, INSTALLING, OR BUYING AFTERMARKET CATALYTIC CONVERTERS
When can I install an aftermarket converter?
Generally, there are only 3 situations when you can install an aftermarket converter.
They are:
(1)if the converter is missing from the vehicle when brought in for exhaust system repair; or
(2)if a State or local inspection program has determined the existing converter has been lead poisoned, damaged, or otherwise needs replacement; or
(3)if the vehicle is more than 5 years old or has more than 50,000 miles*
(8 years/80,000 miles for 1995 and newer vehicles) and a legitimate need for replacement has been established and appropriately documented (e.g., a plugged converter or unrepairable exhaust leaks).
Any other converter replacement must be with a 'certified' or new original equipment (OE) or equivalent converter. Aftermarket converters subject to the enforcement policy requirements cannot be used for replacement if:
(1)the existing converter is present and functioning properly; or
(2)the replacement is under recall or warranty; or
(3)the vehicle is returning from overseas use.
*Vehicles with less age or mileage may be entitled to free repairs by the vehicle manufacturer under the emissions warranty if the original converter was defective.
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