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velocity

  1. J

    That catalytic game, 02 4.6 limited.

    2002 Explorer 4.6, if read tons of stuff about exhaust for them but I haven' found a real answer on something. If you were to remove the cats, replace them with straight pipe then installing the o2 sensor in the same relative spot would the system work with no CEL? And with that being said...
  2. A

    Exhaust Velocity

    Ok so just like everyone else on here, i have come to a point where i would like to redo my exhaust... I know on exhaust you have to find the correct pipe size that balances exhaust gas velocity and back pressure (a pipe small enough to keep exhaust velocity up, but big enough that it's not...
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