Quote:
Originally Posted by C.Doner
Is your cat toast. If not what is wrong. Are you not passing smog. An aftermarket cat may work. I know there are Cali legal universal cats from magnaflow. They may have one that fits your car.
Adding more cats would have little effect unless they are close to the engine. They need to be very hot to make the catalyst work. Plus as W.Hunter says its probably not legal.
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I have 4 years on my CARB high flow magnaflow cat and I still pass emissions.
Just replace the OE one with a Magnaflow and be done with it. Putting a second on is a waste of time and money.