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puzzling long tube question

This is a discussion on puzzling long tube question within the External Engine forums, part of the LSx Technical Help Section category; maybe i just don't comprehend things very well, but iv been shopping around for a while for a set of ...

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    puzzling long tube question

    maybe i just don't comprehend things very well, but iv been shopping around for a while for a set of long tube headers w/ emissions and on all of then they have a hole where the tubes come together for the o2 sensors. now do they go before the cats on the stock set up. and if so couldn't you just not install the cats and the 02 sensors would never know the difference? thanks

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    Member c5z28's Avatar
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    On our cars there are 4 o2 sensors. 2 before the cats to tell the car how efficiently it is burning the fuel and 2 behind the cats to see if the cats are working. So yes most people don't run cats, and yes some run o2 simulators but that's a waste of money. Running front o2's is only going to keep the car running optimal in all conditions.

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    Member WS6ICK2K's Avatar
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    Quote Originally Posted by c5z28 View Post
    On our cars there are 4 o2 sensors. 2 before the cats to tell the car how efficiently it is burning the fuel and 2 behind the cats to see if the cats are working. So yes most people don't run cats, and yes some run o2 simulators but that's a waste of money. Running front o2's is only going to keep the car running optimal in all conditions.
    Agree with him. Most people do away with the second ones. You can have them deleted permanently to fix the cat efficency test. Def need the first ones for fuel ratio etc...

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    Get rid of the cats also while you are down there!
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