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Discussion Starter · #1 ·
i bought the car with an exhaust already on it and ive looked for markings. im positive that it was a custom shop exhaust but what i want to know now is how can i tell about the cats. there are two stock right? and how can you tell if the cat is aftermarket? the exhaust is dual and over the axle but i havent been able to see any farther then that.
 

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take a picture and post it

there is one main catalytic converter. (also 2 pre-cats in the exhaust manifolds), the "2nd" cat you are referring to is probably nothing more then the resonator.
 

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maybe just an axle back but yeah post a pic and we can tell quickly for u
 
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