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ok im interested in removing my cat. ive got a magnaflow cat back. i know you need a co2 sim to remove it any everything but are they all universal or do u need one for my car? and when i do remove the cat what do i put in place of it? my extra magnaflow pipe?

 
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wow, i didnt know so many people dont know anything about this

 
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you can get replacement ones from Randon Tech. i believe, maybe a few others too.
sorry, i dont know about the sensor

 
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Eh? I thought 'cat-back' means your system is "from the cat, back". As in, you're replacing all the pipe after your cat w/ the pipe (bigger diameter, smooth bends, etc.) that came w/ your Magnaflow. So you still need a cat. What else you gonna bolt to your header's a-pipe? Besides, it's illegal to run w/o a cat. Emissions and pollutants and all that good stuff that a cat converts.

 
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you supposedly need a 02 sim for the second o2 sensor so you don't get a check engine light,

 
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i have one 02 sim i don't need........

 
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lol ill take it