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Performance gain from bypassing 1st cat?

Discussion in 'Performance and Tuning' started by TRDBoonie, Feb 25, 2010.

  1. Feb 25, 2010 at 5:07 PM

    TRDBoonie [OP] New Member

    Feb 9, 2010
    Gladstone OR
    03' TRD double cab 4wd v-6
    3" Revtek lift, K&N intake, Flow master, Doug Thorley headers,
    I'm getting ready to install my Thorley headers and was wondering if anyone has bypassed the first cat on there Tacoma's. If so how did it effect your performance and any problems with the check engine light coming on?

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