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Exhaust Question

This is a discussion on Exhaust Question within the External Engine forums, part of the LSx Technical Help Section category; Hey guys, I know this sounds like a total noob question and probably is. I currently have a borla exhaust ...

  1. #1
    Junior Member Blew_By_U's Avatar
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    2000 Trans AM WS6

    Exhaust Question

    Hey guys, I know this sounds like a total noob question and probably is. I currently have a borla exhaust catback, I plan on ordering some lt headers this week and wanted to know on a 5.7l how much difference in the sound will I get? I mean will it be a LOT louder or just a little? Also, I am getting the ORY along with it, do I still need hi flow cats?

    Thanks a lot,

    Tony

  2. #2
    Veteran Blackbird WS6's Avatar
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    it will be louder and if your state does not use cats you should get a cat less ory and with no cats it will even be louder just my .02

  3. #3
    Junior Member Blew_By_U's Avatar
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    Thanks a lot, couple more questions. So on the v8 fbody the cats are actually built in to the y pipe? Also, will I trip any kind of 02 sensor by going catless?

    Thanks,
    Tony

  4. #4
    Veteran Blackbird WS6's Avatar
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    they sell SIM for the 02 or you could get them turned off by a tuner

  5. #5
    MANWHORE TEAM suede's Avatar
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    or let them read ambient air.... it will be alot louder....

  6. #6
    Senior Member big hammer's Avatar
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    you can turn the o2 sensors off with a diablo handheld tuner.

  7. #7
    Member WS6ICK2K's Avatar
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    Metallic Blue
    2000 Trans Am WS6

    Headers give it alot more volume to the sound alot deeper and go with the catless Y. As for the codes, just tune them out. LSXtune uses mail order to flash your pcm and tune it for like $125 alot better than a handheld.

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