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You can always trust an exhaust component made by Kooks, and their catalytic converters are no different. The sole converter we carry on our site is designed for universal fitment and is legal for application on both gas and diesel vehicles in 49 states – omitting California, which has adopted its own set of emissions regulations. Quality-crafted and designed to improve power while reducing the negative effects of noxious fumes, Kooks catalytic converters are backed by an unparalleled 1-Year, Lower Price Guarantee.
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Customer Reviews

Kooks Universal Ultra High-Performance Green Catalytic Converters (Federal EPA-Compliant)

Great Cats!

I used to live in a state that was easy to get around emissions, and a younger, dumber version of me decided to decat my truck when I installed long tube headers. Well after moving to a much stricter state, I had to get cats put on. These fit in the very tight space I had for new ones, passed emissions no problem. Truck is a little quieter, but still sounds the same, with no noticeable loss in power. You get what you pay for, and these are doing a great job. View more reviews...
Posted By Kyle B (LITTLE ELM, TX) / October 24, 2018
2005 Chevy Silverado