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I'm thinking of having a shop make me a new front pipe with a cat and place bungs before and after it for o2 sensors.
I really want to know the technical differences between the primary and secondary cats tho. If they are close to the same thing Idk if it's worth going through the hassle of getting a replacement primary.
If you had to replace the secondary cat, do exhaust shops sell 'secondary' cats or are they just slapping on a universal?
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